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-rw-r--r--crypto/src/asn1/DerInteger.cs7
-rw-r--r--crypto/src/asn1/cms/AuthEnvelopedData.cs2
-rw-r--r--crypto/src/asn1/cms/CompressedData.cs2
-rw-r--r--crypto/src/asn1/cms/KEKRecipientInfo.cs2
-rw-r--r--crypto/src/asn1/cms/KemRecipientInfo.cs2
-rw-r--r--crypto/src/asn1/cms/KeyAgreeRecipientInfo.cs2
-rw-r--r--crypto/src/asn1/cms/KeyTransRecipientInfo.cs4
-rw-r--r--crypto/src/asn1/cms/PasswordRecipientInfo.cs4
-rw-r--r--crypto/src/asn1/cms/RecipientInfo.cs2
-rw-r--r--crypto/src/asn1/cms/SignedData.cs8
-rw-r--r--crypto/src/asn1/cms/TimeStampedData.cs2
-rw-r--r--crypto/src/asn1/crmf/PKIPublicationInfo.cs4
-rw-r--r--crypto/src/asn1/icao/CscaMasterList.cs2
-rw-r--r--crypto/src/asn1/icao/LDSSecurityObject.cs4
-rw-r--r--crypto/src/asn1/ocsp/ResponseData.cs2
-rw-r--r--crypto/src/asn1/ocsp/TBSRequest.cs2
-rw-r--r--crypto/src/asn1/pkcs/CertificationRequestInfo.cs2
-rw-r--r--crypto/src/asn1/pkcs/EncryptedData.cs2
-rw-r--r--crypto/src/asn1/pkcs/Pfx.cs2
-rw-r--r--crypto/src/asn1/pkcs/RSAPrivateKeyStructure.cs2
-rw-r--r--crypto/src/asn1/pkcs/RSASSAPSSparams.cs2
-rw-r--r--crypto/src/asn1/sec/ECPrivateKeyStructure.cs2
-rw-r--r--crypto/src/asn1/tsp/EvidenceRecord.cs4
-rw-r--r--crypto/src/asn1/tsp/TSTInfo.cs2
-rw-r--r--crypto/src/asn1/tsp/TimeStampReq.cs2
-rw-r--r--crypto/src/asn1/x509/AttributeCertificateInfo.cs2
-rw-r--r--crypto/src/asn1/x509/TBSCertList.cs2
-rw-r--r--crypto/src/asn1/x509/TBSCertificateStructure.cs2
-rw-r--r--crypto/src/asn1/x509/V1TBSCertificateGenerator.cs2
-rw-r--r--crypto/src/asn1/x509/V2AttributeCertificateInfoGenerator.cs2
-rw-r--r--crypto/src/asn1/x509/V2TBSCertListGenerator.cs2
-rw-r--r--crypto/src/asn1/x509/V3TBSCertificateGenerator.cs2
-rw-r--r--crypto/src/cms/CMSCompressedDataStreamGenerator.cs2
-rw-r--r--crypto/src/cms/CMSSignedDataStreamGenerator.cs10
-rw-r--r--crypto/src/crypto/operators/Asn1Signature.cs2
-rw-r--r--crypto/src/crypto/util/OpenSshPrivateKeyUtilities.cs2
-rw-r--r--crypto/src/openssl/MiscPemGenerator.cs2
-rw-r--r--crypto/src/operators/utilities/DefaultSignatureAlgorithmFinder.cs2
-rw-r--r--crypto/src/pkcs/Pkcs10CertificationRequest.cs2
-rw-r--r--crypto/src/pkix/PkixCertPath.cs2
-rw-r--r--crypto/src/pqc/crypto/utils/PqcPrivateKeyInfoFactory.cs2
-rw-r--r--crypto/src/security/SignerUtilities.cs2
-rw-r--r--crypto/src/tls/crypto/impl/RsaUtilities.cs2
-rw-r--r--crypto/src/x509/X509Utilities.cs2
-rw-r--r--crypto/test/src/asn1/test/GenerationTest.cs16
-rw-r--r--crypto/test/src/asn1/test/OctetStringTest.cs2
-rw-r--r--crypto/test/src/asn1/test/OtherCertIDUnitTest.cs2
-rw-r--r--crypto/test/src/asn1/test/ProcurationSyntaxUnitTest.cs2
-rw-r--r--crypto/test/src/asn1/test/TagTest.cs2
-rw-r--r--crypto/test/src/tsp/test/GenTimeAccuracyTest.cs8
50 files changed, 78 insertions, 71 deletions
diff --git a/crypto/src/asn1/DerInteger.cs b/crypto/src/asn1/DerInteger.cs
index 81d6437c7..d68a71e9d 100644
--- a/crypto/src/asn1/DerInteger.cs
+++ b/crypto/src/asn1/DerInteger.cs
@@ -23,6 +23,13 @@ namespace Org.BouncyCastle.Asn1
 
         public const string AllowUnsafeProperty = "Org.BouncyCastle.Asn1.AllowUnsafeInteger";
 
+        public static readonly DerInteger Zero = new DerInteger(0);
+        public static readonly DerInteger One = new DerInteger(1);
+        public static readonly DerInteger Two = new DerInteger(2);
+        public static readonly DerInteger Three = new DerInteger(3);
+        public static readonly DerInteger Four = new DerInteger(4);
+        public static readonly DerInteger Five = new DerInteger(5);
+
         internal static bool AllowUnsafe()
         {
             string allowUnsafeValue = Platform.GetEnvironmentVariable(AllowUnsafeProperty);
diff --git a/crypto/src/asn1/cms/AuthEnvelopedData.cs b/crypto/src/asn1/cms/AuthEnvelopedData.cs
index bbcde8180..ae0380b64 100644
--- a/crypto/src/asn1/cms/AuthEnvelopedData.cs
+++ b/crypto/src/asn1/cms/AuthEnvelopedData.cs
@@ -36,7 +36,7 @@ namespace Org.BouncyCastle.Asn1.Cms
 			Asn1Set					unauthAttrs)
 		{
 			// "It MUST be set to 0."
-			this.version = new DerInteger(0);
+			this.version = DerInteger.Zero;
 
 			this.originatorInfo = originatorInfo;
 
diff --git a/crypto/src/asn1/cms/CompressedData.cs b/crypto/src/asn1/cms/CompressedData.cs
index 4b326247e..5ae71708d 100644
--- a/crypto/src/asn1/cms/CompressedData.cs
+++ b/crypto/src/asn1/cms/CompressedData.cs
@@ -43,7 +43,7 @@ namespace Org.BouncyCastle.Asn1.Cms
             AlgorithmIdentifier	compressionAlgorithm,
             ContentInfo			encapContentInfo)
         {
-            this.version = new DerInteger(0);
+            this.version = DerInteger.Zero;
             this.compressionAlgorithm = compressionAlgorithm;
             this.encapContentInfo = encapContentInfo;
         }
diff --git a/crypto/src/asn1/cms/KEKRecipientInfo.cs b/crypto/src/asn1/cms/KEKRecipientInfo.cs
index 76ce9c643..b1b85953e 100644
--- a/crypto/src/asn1/cms/KEKRecipientInfo.cs
+++ b/crypto/src/asn1/cms/KEKRecipientInfo.cs
@@ -35,7 +35,7 @@ namespace Org.BouncyCastle.Asn1.Cms
             AlgorithmIdentifier keyEncryptionAlgorithm,
             Asn1OctetString     encryptedKey)
         {
-            this.version = new DerInteger(4);
+            this.version = DerInteger.Four;
             this.kekID = kekID;
             this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
             this.encryptedKey = encryptedKey;
diff --git a/crypto/src/asn1/cms/KemRecipientInfo.cs b/crypto/src/asn1/cms/KemRecipientInfo.cs
index c7251fbb1..4f771784a 100644
--- a/crypto/src/asn1/cms/KemRecipientInfo.cs
+++ b/crypto/src/asn1/cms/KemRecipientInfo.cs
@@ -33,7 +33,7 @@ namespace Org.BouncyCastle.Asn1.Cms
             return new KemRecipientInfo(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
         }
 
-        private static readonly DerInteger V1 = new DerInteger(0);
+        private static readonly DerInteger V1 = DerInteger.Zero;
 
         private readonly DerInteger m_cmsVersion;
         private readonly RecipientIdentifier m_rid;
diff --git a/crypto/src/asn1/cms/KeyAgreeRecipientInfo.cs b/crypto/src/asn1/cms/KeyAgreeRecipientInfo.cs
index 63eebcea3..345a45029 100644
--- a/crypto/src/asn1/cms/KeyAgreeRecipientInfo.cs
+++ b/crypto/src/asn1/cms/KeyAgreeRecipientInfo.cs
@@ -37,7 +37,7 @@ namespace Org.BouncyCastle.Asn1.Cms
             AlgorithmIdentifier         keyEncryptionAlgorithm,
             Asn1Sequence                recipientEncryptedKeys)
         {
-            this.version = new DerInteger(3);
+            this.version = DerInteger.Three;
             this.originator = originator;
             this.ukm = ukm;
             this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
diff --git a/crypto/src/asn1/cms/KeyTransRecipientInfo.cs b/crypto/src/asn1/cms/KeyTransRecipientInfo.cs
index 6981e87f9..1d9825b02 100644
--- a/crypto/src/asn1/cms/KeyTransRecipientInfo.cs
+++ b/crypto/src/asn1/cms/KeyTransRecipientInfo.cs
@@ -38,11 +38,11 @@ namespace Org.BouncyCastle.Asn1.Cms
         {
             if (rid.ToAsn1Object() is Asn1TaggedObject)
             {
-                this.version = new DerInteger(2);
+                this.version = DerInteger.Two;
             }
             else
             {
-                this.version = new DerInteger(0);
+                this.version = DerInteger.Zero;
             }
 
 			this.rid = rid;
diff --git a/crypto/src/asn1/cms/PasswordRecipientInfo.cs b/crypto/src/asn1/cms/PasswordRecipientInfo.cs
index 67ff01cf8..5fac434ca 100644
--- a/crypto/src/asn1/cms/PasswordRecipientInfo.cs
+++ b/crypto/src/asn1/cms/PasswordRecipientInfo.cs
@@ -34,7 +34,7 @@ namespace Org.BouncyCastle.Asn1.Cms
             AlgorithmIdentifier	keyEncryptionAlgorithm,
             Asn1OctetString		encryptedKey)
         {
-            this.version = new DerInteger(0);
+            this.version = DerInteger.Zero;
             this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
             this.encryptedKey = encryptedKey;
         }
@@ -44,7 +44,7 @@ namespace Org.BouncyCastle.Asn1.Cms
 			AlgorithmIdentifier	keyEncryptionAlgorithm,
 			Asn1OctetString		encryptedKey)
 		{
-			this.version = new DerInteger(0);
+			this.version = DerInteger.Zero;
 			this.keyDerivationAlgorithm = keyDerivationAlgorithm;
 			this.keyEncryptionAlgorithm = keyEncryptionAlgorithm;
 			this.encryptedKey = encryptedKey;
diff --git a/crypto/src/asn1/cms/RecipientInfo.cs b/crypto/src/asn1/cms/RecipientInfo.cs
index ff93258b6..85bd7e585 100644
--- a/crypto/src/asn1/cms/RecipientInfo.cs
+++ b/crypto/src/asn1/cms/RecipientInfo.cs
@@ -82,7 +82,7 @@ namespace Org.BouncyCastle.Asn1.Cms
 					case 3:
 						return PasswordRecipientInfo.GetInstance(o, false).Version;
 					case 4:
-						return new DerInteger(0);    // no syntax version for OtherRecipientInfo
+						return DerInteger.Zero;    // no syntax version for OtherRecipientInfo
 					default:
 						throw new InvalidOperationException("unknown tag");
 					}
diff --git a/crypto/src/asn1/cms/SignedData.cs b/crypto/src/asn1/cms/SignedData.cs
index 858715ad6..380305c32 100644
--- a/crypto/src/asn1/cms/SignedData.cs
+++ b/crypto/src/asn1/cms/SignedData.cs
@@ -22,10 +22,10 @@ namespace Org.BouncyCastle.Asn1.Cms
             return new SignedData(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
         }
 
-        private static readonly DerInteger Version1 = new DerInteger(1);
-        private static readonly DerInteger Version3 = new DerInteger(3);
-        private static readonly DerInteger Version4 = new DerInteger(4);
-        private static readonly DerInteger Version5 = new DerInteger(5);
+        private static readonly DerInteger Version1 = DerInteger.One;
+        private static readonly DerInteger Version3 = DerInteger.Three;
+        private static readonly DerInteger Version4 = DerInteger.Four;
+        private static readonly DerInteger Version5 = DerInteger.Five;
 
         private readonly DerInteger		version;
         private readonly Asn1Set		digestAlgorithms;
diff --git a/crypto/src/asn1/cms/TimeStampedData.cs b/crypto/src/asn1/cms/TimeStampedData.cs
index 4d9136ea0..cae290609 100644
--- a/crypto/src/asn1/cms/TimeStampedData.cs
+++ b/crypto/src/asn1/cms/TimeStampedData.cs
@@ -28,7 +28,7 @@ namespace Org.BouncyCastle.Asn1.Cms
 		public TimeStampedData(DerIA5String dataUri, MetaData metaData, Asn1OctetString content,
 			Evidence temporalEvidence)
 		{
-			this.version = new DerInteger(1);
+			this.version = DerInteger.One;
 			this.dataUri = dataUri;
 			this.metaData = metaData;
 			this.content = content;
diff --git a/crypto/src/asn1/crmf/PKIPublicationInfo.cs b/crypto/src/asn1/crmf/PKIPublicationInfo.cs
index 5cc1df013..3c12dffa5 100644
--- a/crypto/src/asn1/crmf/PKIPublicationInfo.cs
+++ b/crypto/src/asn1/crmf/PKIPublicationInfo.cs
@@ -19,8 +19,8 @@ namespace Org.BouncyCastle.Asn1.Crmf
     public class PkiPublicationInfo
         : Asn1Encodable
     {
-        public static readonly DerInteger DontPublish = new DerInteger(0);
-        public static readonly DerInteger PleasePublish = new DerInteger(1);
+        public static readonly DerInteger DontPublish = DerInteger.Zero;
+        public static readonly DerInteger PleasePublish = DerInteger.One;
 
         public static PkiPublicationInfo GetInstance(object obj)
         {
diff --git a/crypto/src/asn1/icao/CscaMasterList.cs b/crypto/src/asn1/icao/CscaMasterList.cs
index 4c6ea827c..a54432f8f 100644
--- a/crypto/src/asn1/icao/CscaMasterList.cs
+++ b/crypto/src/asn1/icao/CscaMasterList.cs
@@ -48,7 +48,7 @@ namespace Org.BouncyCastle.Asn1.Icao
 
 		public CscaMasterList(X509CertificateStructure[] certStructs)
 		{
-			m_version = new DerInteger(0);
+			m_version = DerInteger.Zero;
 			m_certList = CopyCertList(certStructs);
 		}
 
diff --git a/crypto/src/asn1/icao/LDSSecurityObject.cs b/crypto/src/asn1/icao/LDSSecurityObject.cs
index 9fcb4e5b9..59a3d0550 100644
--- a/crypto/src/asn1/icao/LDSSecurityObject.cs
+++ b/crypto/src/asn1/icao/LDSSecurityObject.cs
@@ -64,7 +64,7 @@ namespace Org.BouncyCastle.Asn1.Icao
 
         public LdsSecurityObject(AlgorithmIdentifier digestAlgorithmIdentifier, DataGroupHash[] datagroupHash)
         {
-            m_version = new DerInteger(0);
+            m_version = DerInteger.Zero;
 			m_hashAlgorithm = digestAlgorithmIdentifier ?? throw new ArgumentNullException(nameof(digestAlgorithmIdentifier)); ;
 			m_datagroupHashValues = datagroupHash ?? throw new ArgumentNullException(nameof(datagroupHash));
             m_ldsVersionInfo = null;
@@ -75,7 +75,7 @@ namespace Org.BouncyCastle.Asn1.Icao
         public LdsSecurityObject(AlgorithmIdentifier digestAlgorithmIdentifier, DataGroupHash[] datagroupHash,
             LdsVersionInfo versionInfo)
         {
-            m_version = new DerInteger(1);
+            m_version = DerInteger.One;
             m_hashAlgorithm = digestAlgorithmIdentifier ?? throw new ArgumentNullException(nameof(digestAlgorithmIdentifier)); ;
             m_datagroupHashValues = datagroupHash ?? throw new ArgumentNullException(nameof(datagroupHash));
             m_ldsVersionInfo = versionInfo;
diff --git a/crypto/src/asn1/ocsp/ResponseData.cs b/crypto/src/asn1/ocsp/ResponseData.cs
index 08b80d673..81ea2d0d3 100644
--- a/crypto/src/asn1/ocsp/ResponseData.cs
+++ b/crypto/src/asn1/ocsp/ResponseData.cs
@@ -21,7 +21,7 @@ namespace Org.BouncyCastle.Asn1.Ocsp
             return new ResponseData(Asn1Sequence.GetInstance(obj, explicitly));
         }
 
-        private static readonly DerInteger V1 = new DerInteger(0);
+        private static readonly DerInteger V1 = DerInteger.Zero;
 
         private readonly DerInteger m_version;
         private readonly bool m_versionPresent;
diff --git a/crypto/src/asn1/ocsp/TBSRequest.cs b/crypto/src/asn1/ocsp/TBSRequest.cs
index e041a9763..8f44464d1 100644
--- a/crypto/src/asn1/ocsp/TBSRequest.cs
+++ b/crypto/src/asn1/ocsp/TBSRequest.cs
@@ -21,7 +21,7 @@ namespace Org.BouncyCastle.Asn1.Ocsp
             return new TbsRequest(Asn1Sequence.GetInstance(obj, explicitly));
         }
 
-        private static readonly DerInteger V1 = new DerInteger(0);
+        private static readonly DerInteger V1 = DerInteger.Zero;
 
         private readonly DerInteger m_version;
         private readonly bool m_versionPresent;
diff --git a/crypto/src/asn1/pkcs/CertificationRequestInfo.cs b/crypto/src/asn1/pkcs/CertificationRequestInfo.cs
index 795757533..196d9f4e5 100644
--- a/crypto/src/asn1/pkcs/CertificationRequestInfo.cs
+++ b/crypto/src/asn1/pkcs/CertificationRequestInfo.cs
@@ -25,7 +25,7 @@ namespace Org.BouncyCastle.Asn1.Pkcs
     public class CertificationRequestInfo
         : Asn1Encodable
     {
-        internal DerInteger				version = new DerInteger(0);
+        internal DerInteger				version = DerInteger.Zero;
         internal X509Name				subject;
         internal SubjectPublicKeyInfo	subjectPKInfo;
         internal Asn1Set				attributes;
diff --git a/crypto/src/asn1/pkcs/EncryptedData.cs b/crypto/src/asn1/pkcs/EncryptedData.cs
index fdee60405..f75975d5a 100644
--- a/crypto/src/asn1/pkcs/EncryptedData.cs
+++ b/crypto/src/asn1/pkcs/EncryptedData.cs
@@ -97,7 +97,7 @@ namespace Org.BouncyCastle.Asn1.Pkcs
 
 		public override Asn1Object ToAsn1Object()
         {
-			return new BerSequence(new DerInteger(0), data);
+			return new BerSequence(DerInteger.Zero, data);
         }
     }
 }
diff --git a/crypto/src/asn1/pkcs/Pfx.cs b/crypto/src/asn1/pkcs/Pfx.cs
index c1399e560..67d69a5ae 100644
--- a/crypto/src/asn1/pkcs/Pfx.cs
+++ b/crypto/src/asn1/pkcs/Pfx.cs
@@ -55,7 +55,7 @@ namespace Org.BouncyCastle.Asn1.Pkcs
 
         public override Asn1Object ToAsn1Object()
         {
-            Asn1EncodableVector v = new Asn1EncodableVector(new DerInteger(3), contentInfo);
+            Asn1EncodableVector v = new Asn1EncodableVector(DerInteger.Three, contentInfo);
             v.AddOptional(macData);
             return new BerSequence(v);
         }
diff --git a/crypto/src/asn1/pkcs/RSAPrivateKeyStructure.cs b/crypto/src/asn1/pkcs/RSAPrivateKeyStructure.cs
index c445df562..0e7911163 100644
--- a/crypto/src/asn1/pkcs/RSAPrivateKeyStructure.cs
+++ b/crypto/src/asn1/pkcs/RSAPrivateKeyStructure.cs
@@ -128,7 +128,7 @@ namespace Org.BouncyCastle.Asn1.Pkcs
         public override Asn1Object ToAsn1Object()
         {
             return new DerSequence(
-                new DerInteger(0), // version
+                DerInteger.Zero, // version
                 new DerInteger(Modulus),
                 new DerInteger(PublicExponent),
                 new DerInteger(PrivateExponent),
diff --git a/crypto/src/asn1/pkcs/RSASSAPSSparams.cs b/crypto/src/asn1/pkcs/RSASSAPSSparams.cs
index e5800993f..ead2faa73 100644
--- a/crypto/src/asn1/pkcs/RSASSAPSSparams.cs
+++ b/crypto/src/asn1/pkcs/RSASSAPSSparams.cs
@@ -17,7 +17,7 @@ namespace Org.BouncyCastle.Asn1.Pkcs
 		public readonly static AlgorithmIdentifier DefaultHashAlgorithm = new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1, DerNull.Instance);
 		public readonly static AlgorithmIdentifier DefaultMaskGenFunction = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, DefaultHashAlgorithm);
 		public readonly static DerInteger DefaultSaltLength = new DerInteger(20);
-		public readonly static DerInteger DefaultTrailerField = new DerInteger(1);
+		public readonly static DerInteger DefaultTrailerField = DerInteger.One;
 
 		public static RsassaPssParameters GetInstance(
 			object obj)
diff --git a/crypto/src/asn1/sec/ECPrivateKeyStructure.cs b/crypto/src/asn1/sec/ECPrivateKeyStructure.cs
index 89b87bf2b..298a0ba79 100644
--- a/crypto/src/asn1/sec/ECPrivateKeyStructure.cs
+++ b/crypto/src/asn1/sec/ECPrivateKeyStructure.cs
@@ -56,7 +56,7 @@ namespace Org.BouncyCastle.Asn1.Sec
             byte[] bytes = BigIntegers.AsUnsignedByteArray((orderBitLength + 7) / 8, key);
 
             Asn1EncodableVector v = new Asn1EncodableVector(
-                new DerInteger(1),
+                DerInteger.One,
                 new DerOctetString(bytes));
 
             v.AddOptionalTagged(true, 0, parameters);
diff --git a/crypto/src/asn1/tsp/EvidenceRecord.cs b/crypto/src/asn1/tsp/EvidenceRecord.cs
index 1be8a3998..9957b1050 100644
--- a/crypto/src/asn1/tsp/EvidenceRecord.cs
+++ b/crypto/src/asn1/tsp/EvidenceRecord.cs
@@ -112,7 +112,7 @@ namespace Org.BouncyCastle.Asn1.Tsp
          */
         public EvidenceRecord(CryptoInfos cryptoInfos, EncryptionInfo encryptionInfo, ArchiveTimeStamp archiveTimeStamp)
         {
-            m_version = new DerInteger(1);
+            m_version = DerInteger.One;
             m_digestAlgorithms = new DerSequence(archiveTimeStamp.GetDigestAlgorithmIdentifier());
             m_cryptoInfos = cryptoInfos;
             m_encryptionInfo = encryptionInfo;
@@ -122,7 +122,7 @@ namespace Org.BouncyCastle.Asn1.Tsp
         public EvidenceRecord(AlgorithmIdentifier[] digestAlgorithms, CryptoInfos cryptoInfos,
             EncryptionInfo encryptionInfo, ArchiveTimeStampSequence archiveTimeStampSequence)
         {
-            m_version = new DerInteger(1);
+            m_version = DerInteger.One;
             m_digestAlgorithms = new DerSequence(digestAlgorithms);
             m_cryptoInfos = cryptoInfos;
             m_encryptionInfo = encryptionInfo;
diff --git a/crypto/src/asn1/tsp/TSTInfo.cs b/crypto/src/asn1/tsp/TSTInfo.cs
index 8aefe6159..80302975f 100644
--- a/crypto/src/asn1/tsp/TSTInfo.cs
+++ b/crypto/src/asn1/tsp/TSTInfo.cs
@@ -99,7 +99,7 @@ namespace Org.BouncyCastle.Asn1.Tsp
             Asn1GeneralizedTime genTime, Accuracy accuracy, DerBoolean ordering, DerInteger nonce, GeneralName tsa,
             X509Extensions extensions)
         {
-            m_version = new DerInteger(1);
+            m_version = DerInteger.One;
             m_tsaPolicyID = tsaPolicyId;
             m_messageImprint = messageImprint;
             m_serialNumber = serialNumber;
diff --git a/crypto/src/asn1/tsp/TimeStampReq.cs b/crypto/src/asn1/tsp/TimeStampReq.cs
index 6b3afd553..aa9621007 100644
--- a/crypto/src/asn1/tsp/TimeStampReq.cs
+++ b/crypto/src/asn1/tsp/TimeStampReq.cs
@@ -72,7 +72,7 @@ namespace Org.BouncyCastle.Asn1.Tsp
             DerBoolean certReq, X509Extensions extensions)
         {
             // default
-            m_version = new DerInteger(1);
+            m_version = DerInteger.One;
 
             m_messageImprint = messageImprint;
             m_tsaPolicy = tsaPolicy;
diff --git a/crypto/src/asn1/x509/AttributeCertificateInfo.cs b/crypto/src/asn1/x509/AttributeCertificateInfo.cs
index dde432ee6..d5e65323f 100644
--- a/crypto/src/asn1/x509/AttributeCertificateInfo.cs
+++ b/crypto/src/asn1/x509/AttributeCertificateInfo.cs
@@ -56,7 +56,7 @@ namespace Org.BouncyCastle.Asn1.X509
             }
             else
             {
-                this.version = new DerInteger(0);
+                this.version = DerInteger.Zero;
                 start = 0;
             }
 
diff --git a/crypto/src/asn1/x509/TBSCertList.cs b/crypto/src/asn1/x509/TBSCertList.cs
index fb8a9907c..8fa1e9822 100644
--- a/crypto/src/asn1/x509/TBSCertList.cs
+++ b/crypto/src/asn1/x509/TBSCertList.cs
@@ -174,7 +174,7 @@ namespace Org.BouncyCastle.Asn1.X509
 			}
             else
             {
-                version = new DerInteger(0);
+                version = DerInteger.Zero;
             }
 
 			signature = AlgorithmIdentifier.GetInstance(seq[seqPos++]);
diff --git a/crypto/src/asn1/x509/TBSCertificateStructure.cs b/crypto/src/asn1/x509/TBSCertificateStructure.cs
index e41224f4a..e1daef3ff 100644
--- a/crypto/src/asn1/x509/TBSCertificateStructure.cs
+++ b/crypto/src/asn1/x509/TBSCertificateStructure.cs
@@ -69,7 +69,7 @@ namespace Org.BouncyCastle.Asn1.X509
 			else
 			{
 				seqStart = -1;          // field 0 is missing!
-				version = new DerInteger(0);
+				version = DerInteger.Zero;
 			}
 
             bool isV1 = false;
diff --git a/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs b/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
index 7c191b263..5d9bdb72a 100644
--- a/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
+++ b/crypto/src/asn1/x509/V1TBSCertificateGenerator.cs
@@ -19,7 +19,7 @@ namespace Org.BouncyCastle.Asn1.X509
      */
     public class V1TbsCertificateGenerator
     {
-        internal DerTaggedObject		version = new DerTaggedObject(0, new DerInteger(0));
+        internal DerTaggedObject		version = new DerTaggedObject(0, DerInteger.Zero);
         internal DerInteger				serialNumber;
         internal AlgorithmIdentifier	signature;
         internal X509Name				issuer;
diff --git a/crypto/src/asn1/x509/V2AttributeCertificateInfoGenerator.cs b/crypto/src/asn1/x509/V2AttributeCertificateInfoGenerator.cs
index c78c966b0..86d396e30 100644
--- a/crypto/src/asn1/x509/V2AttributeCertificateInfoGenerator.cs
+++ b/crypto/src/asn1/x509/V2AttributeCertificateInfoGenerator.cs
@@ -36,7 +36,7 @@ namespace Org.BouncyCastle.Asn1.X509
 
 		public V2AttributeCertificateInfoGenerator()
         {
-            this.version = new DerInteger(1);
+            this.version = DerInteger.One;
             attributes = new Asn1EncodableVector();
         }
 
diff --git a/crypto/src/asn1/x509/V2TBSCertListGenerator.cs b/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
index d744ed664..fb568f21c 100644
--- a/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
+++ b/crypto/src/asn1/x509/V2TBSCertListGenerator.cs
@@ -29,7 +29,7 @@ namespace Org.BouncyCastle.Asn1.X509
      */
     public class V2TbsCertListGenerator
     {
-        private DerInteger			version = new DerInteger(1);
+        private DerInteger			version = DerInteger.One;
         private AlgorithmIdentifier	signature;
         private X509Name			issuer;
         private Time				thisUpdate, nextUpdate;
diff --git a/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs b/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
index f58e4a7ab..465f17e57 100644
--- a/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
+++ b/crypto/src/asn1/x509/V3TBSCertificateGenerator.cs
@@ -22,7 +22,7 @@ namespace Org.BouncyCastle.Asn1.X509
      */
     public class V3TbsCertificateGenerator
     {
-        internal DerTaggedObject         version = new DerTaggedObject(0, new DerInteger(2));
+        internal DerTaggedObject         version = new DerTaggedObject(0, DerInteger.Two);
         internal DerInteger              serialNumber;
         internal AlgorithmIdentifier     signature;
         internal X509Name                issuer;
diff --git a/crypto/src/cms/CMSCompressedDataStreamGenerator.cs b/crypto/src/cms/CMSCompressedDataStreamGenerator.cs
index f992a8269..0e320aa9f 100644
--- a/crypto/src/cms/CMSCompressedDataStreamGenerator.cs
+++ b/crypto/src/cms/CMSCompressedDataStreamGenerator.cs
@@ -75,7 +75,7 @@ namespace Org.BouncyCastle.Cms
 				sGen.GetRawOutputStream(), 0, true);
 
 			// CMSVersion
-			cGen.AddObject(new DerInteger(0));
+			cGen.AddObject(DerInteger.Zero);
 
 			// CompressionAlgorithmIdentifier
 			cGen.AddObject(new AlgorithmIdentifier(CmsObjectIdentifiers.ZlibCompress));
diff --git a/crypto/src/cms/CMSSignedDataStreamGenerator.cs b/crypto/src/cms/CMSSignedDataStreamGenerator.cs
index 81f6f5068..800093207 100644
--- a/crypto/src/cms/CMSSignedDataStreamGenerator.cs
+++ b/crypto/src/cms/CMSSignedDataStreamGenerator.cs
@@ -653,7 +653,7 @@ namespace Org.BouncyCastle.Cms
 
 			if (otherCert)
 			{
-				return new DerInteger(5);
+				return DerInteger.Five;
 			}
 
 			if (_crls != null)
@@ -670,20 +670,20 @@ namespace Org.BouncyCastle.Cms
 
 			if (otherCrl)
 			{
-				return new DerInteger(5);
+				return DerInteger.Five;
 			}
 
 			if (attrCertV2Found)
 			{
-				return new DerInteger(4);
+				return DerInteger.Four;
 			}
 
             if (attrCertV1Found || !CmsObjectIdentifiers.Data.Equals(contentOid) || CheckForVersion3(_signers))
             {
-                return new DerInteger(3);
+                return DerInteger.Three;
             }
 
-            return new DerInteger(1);
+            return DerInteger.One;
         }
 
 		private bool CheckForVersion3(IList<SignerInformation> signerInfos)
diff --git a/crypto/src/crypto/operators/Asn1Signature.cs b/crypto/src/crypto/operators/Asn1Signature.cs
index cec99dccf..2f5729f3c 100644
--- a/crypto/src/crypto/operators/Asn1Signature.cs
+++ b/crypto/src/crypto/operators/Asn1Signature.cs
@@ -252,7 +252,7 @@ namespace Org.BouncyCastle.Crypto.Operators
 				hashAlgId,
 				new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, hashAlgId),
 				new DerInteger(saltSize),
-				new DerInteger(1));
+				DerInteger.One);
 		}
 
 		internal static DerObjectIdentifier GetAlgorithmOid(string algorithmName)
diff --git a/crypto/src/crypto/util/OpenSshPrivateKeyUtilities.cs b/crypto/src/crypto/util/OpenSshPrivateKeyUtilities.cs
index aa934b1d6..164cea6e4 100644
--- a/crypto/src/crypto/util/OpenSshPrivateKeyUtilities.cs
+++ b/crypto/src/crypto/util/OpenSshPrivateKeyUtilities.cs
@@ -41,7 +41,7 @@ namespace Org.BouncyCastle.Crypto.Utilities
 
                 Asn1EncodableVector vec = new Asn1EncodableVector
                 {
-                    new DerInteger(0),
+                    DerInteger.Zero,
                     new DerInteger(dsaparameters.P),
                     new DerInteger(dsaparameters.Q),
                     new DerInteger(dsaparameters.G)
diff --git a/crypto/src/openssl/MiscPemGenerator.cs b/crypto/src/openssl/MiscPemGenerator.cs
index 75d1e65b3..9ba7d5fd7 100644
--- a/crypto/src/openssl/MiscPemGenerator.cs
+++ b/crypto/src/openssl/MiscPemGenerator.cs
@@ -304,7 +304,7 @@ namespace Org.BouncyCastle.OpenSsl
                 BigInteger y = p.G.ModPow(x, p.P);
 
                 var sequence = new DerSequence(
-                    new DerInteger(0),
+                    DerInteger.Zero,
                     new DerInteger(p.P),
                     new DerInteger(p.Q),
                     new DerInteger(p.G),
diff --git a/crypto/src/operators/utilities/DefaultSignatureAlgorithmFinder.cs b/crypto/src/operators/utilities/DefaultSignatureAlgorithmFinder.cs
index 0da904328..508894e48 100644
--- a/crypto/src/operators/utilities/DefaultSignatureAlgorithmFinder.cs
+++ b/crypto/src/operators/utilities/DefaultSignatureAlgorithmFinder.cs
@@ -501,7 +501,7 @@ namespace Org.BouncyCastle.Operators.Utilities
                 hashAlgID,
                 new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, hashAlgID),
                 new DerInteger(saltSize),
-                new DerInteger(1));
+                DerInteger.One);
         }
 
         protected DefaultSignatureAlgorithmFinder()
diff --git a/crypto/src/pkcs/Pkcs10CertificationRequest.cs b/crypto/src/pkcs/Pkcs10CertificationRequest.cs
index 0534e0b25..ee24f42aa 100644
--- a/crypto/src/pkcs/Pkcs10CertificationRequest.cs
+++ b/crypto/src/pkcs/Pkcs10CertificationRequest.cs
@@ -218,7 +218,7 @@ namespace Org.BouncyCastle.Pkcs
                 hashAlgId,
                 new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, hashAlgId),
                 new DerInteger(saltSize),
-                new DerInteger(1));
+                DerInteger.One);
         }
 
         protected Pkcs10CertificationRequest()
diff --git a/crypto/src/pkix/PkixCertPath.cs b/crypto/src/pkix/PkixCertPath.cs
index 4aec08f09..88c7bf24b 100644
--- a/crypto/src/pkix/PkixCertPath.cs
+++ b/crypto/src/pkix/PkixCertPath.cs
@@ -335,7 +335,7 @@ namespace Org.BouncyCastle.Pkix
                 }
 
                 SignedData sd = new SignedData(
-					new DerInteger(1),
+					DerInteger.One,
 					new DerSet(),
 					encInfo,
                     DerSet.FromVector(v),
diff --git a/crypto/src/pqc/crypto/utils/PqcPrivateKeyInfoFactory.cs b/crypto/src/pqc/crypto/utils/PqcPrivateKeyInfoFactory.cs
index 235478258..cc8882890 100644
--- a/crypto/src/pqc/crypto/utils/PqcPrivateKeyInfoFactory.cs
+++ b/crypto/src/pqc/crypto/utils/PqcPrivateKeyInfoFactory.cs
@@ -114,7 +114,7 @@ namespace Org.BouncyCastle.Pqc.Crypto.Utilities
             if (privateKey is FalconPrivateKeyParameters falconPrivateKeyParameters)
             {
                 Asn1EncodableVector v = new Asn1EncodableVector(4);
-                v.Add(new DerInteger(1));
+                v.Add(DerInteger.One);
                 v.Add(new DerOctetString(falconPrivateKeyParameters.GetSpolyLittleF()));
                 v.Add(new DerOctetString(falconPrivateKeyParameters.GetG()));
                 v.Add(new DerOctetString(falconPrivateKeyParameters.GetSpolyBigF()));
diff --git a/crypto/src/security/SignerUtilities.cs b/crypto/src/security/SignerUtilities.cs
index e2a98343c..980ad52e8 100644
--- a/crypto/src/security/SignerUtilities.cs
+++ b/crypto/src/security/SignerUtilities.cs
@@ -592,7 +592,7 @@ namespace Org.BouncyCastle.Security
 
             int saltLen = DigestUtilities.GetDigest(digestName).GetDigestSize();
             return new RsassaPssParameters(hashAlgorithm, maskGenAlgorithm,
-                new DerInteger(saltLen), new DerInteger(1));
+                new DerInteger(saltLen), DerInteger.One);
         }
 
         // TODO[api] Change parameter name to 'oid'
diff --git a/crypto/src/tls/crypto/impl/RsaUtilities.cs b/crypto/src/tls/crypto/impl/RsaUtilities.cs
index 83782a2ac..fc6d8f8a6 100644
--- a/crypto/src/tls/crypto/impl/RsaUtilities.cs
+++ b/crypto/src/tls/crypto/impl/RsaUtilities.cs
@@ -38,7 +38,7 @@ namespace Org.BouncyCastle.Tls.Crypto.Impl
             DerInteger sha384Size = new DerInteger(TlsCryptoUtilities.GetHashOutputSize(CryptoHashAlgorithm.sha384));
             DerInteger sha512Size = new DerInteger(TlsCryptoUtilities.GetHashOutputSize(CryptoHashAlgorithm.sha512));
 
-            DerInteger trailerField = new DerInteger(1);
+            DerInteger trailerField = DerInteger.One;
 
             try
             {
diff --git a/crypto/src/x509/X509Utilities.cs b/crypto/src/x509/X509Utilities.cs
index cee664370..6f01fc53d 100644
--- a/crypto/src/x509/X509Utilities.cs
+++ b/crypto/src/x509/X509Utilities.cs
@@ -201,7 +201,7 @@ namespace Org.BouncyCastle.X509
 				hashAlgId,
 				new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, hashAlgId),
 				new DerInteger(saltSize),
-				new DerInteger(1));
+				DerInteger.One);
 		}
 
         internal static DerBitString CollectDerBitString(IBlockResult result)
diff --git a/crypto/test/src/asn1/test/GenerationTest.cs b/crypto/test/src/asn1/test/GenerationTest.cs
index 3a0fae8e7..4f4b70c58 100644
--- a/crypto/test/src/asn1/test/GenerationTest.cs
+++ b/crypto/test/src/asn1/test/GenerationTest.cs
@@ -54,7 +54,7 @@ namespace Org.BouncyCastle.Asn1.Tests
             DateTime startDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 1);
             DateTime endDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 12);
 
-            gen.SetSerialNumber(new DerInteger(1));
+            gen.SetSerialNumber(DerInteger.One);
 
             gen.SetStartDate(new Time(startDate));
             gen.SetEndDate(new Time(endDate));
@@ -107,7 +107,7 @@ namespace Org.BouncyCastle.Asn1.Tests
             DateTime startDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 1);
             DateTime endDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 2);
 
-			gen.SetSerialNumber(new DerInteger(2));
+			gen.SetSerialNumber(DerInteger.Two);
 
 			gen.SetStartDate(new Time(startDate));
 			gen.SetEndDate(new Time(endDate));
@@ -121,7 +121,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 				new AlgorithmIdentifier(
 					OiwObjectIdentifiers.ElGamalAlgorithm,
 					new ElGamalParameter(BigInteger.One, BigInteger.Two)),
-				new DerInteger(3));
+				DerInteger.Three);
 
 			gen.SetSubjectPublicKeyInfo(info);
 
@@ -167,7 +167,7 @@ namespace Org.BouncyCastle.Asn1.Tests
             DateTime startDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 1);
             DateTime endDate = MakeUtcDateTime(1970, 1, 1, 0, 0, 2);
 
-			gen.SetSerialNumber(new DerInteger(2));
+			gen.SetSerialNumber(DerInteger.Two);
 
 			gen.SetStartDate(new Time(startDate));
 			gen.SetEndDate(new Time(endDate));
@@ -179,7 +179,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 			SubjectPublicKeyInfo info = new SubjectPublicKeyInfo(
 				new AlgorithmIdentifier(OiwObjectIdentifiers.ElGamalAlgorithm,
 					new ElGamalParameter(BigInteger.One, BigInteger.Two)),
-				new DerInteger(3));
+                DerInteger.Three);
 
 			gen.SetSubjectPublicKeyInfo(info);
 
@@ -241,7 +241,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 
             gen.SetIssuer(new X509Name("CN=AU,O=Bouncy Castle"));
 
-            gen.AddCrlEntry(new DerInteger(1), new Time(MakeUtcDateTime(1970, 1, 1, 0, 0, 1)), ReasonFlags.AACompromise);
+            gen.AddCrlEntry(DerInteger.One, new Time(MakeUtcDateTime(1970, 1, 1, 0, 0, 1)), ReasonFlags.AACompromise);
 
             gen.SetNextUpdate(new Time(MakeUtcDateTime(1970, 1, 1, 0, 0, 2)));
 
@@ -259,7 +259,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 				new AlgorithmIdentifier(
 					OiwObjectIdentifiers.ElGamalAlgorithm,
 					new ElGamalParameter(BigInteger.One, BigInteger.Two)),
-				new DerInteger(3));
+				DerInteger.Three);
 
 			order.Add(X509Extensions.AuthorityKeyIdentifier);
             order.Add(X509Extensions.IssuerAlternativeName);
@@ -268,7 +268,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 
             extensions.Add(X509Extensions.AuthorityKeyIdentifier, new X509Extension(true, new DerOctetString(CreateAuthorityKeyId(info, new X509Name("CN=AU,O=Bouncy Castle,OU=Test 2"), 2))));
             extensions.Add(X509Extensions.IssuerAlternativeName, new X509Extension(false, new DerOctetString(GeneralNames.GetInstance(new DerSequence(new GeneralName(new X509Name("CN=AU,O=Bouncy Castle,OU=Test 3")))))));
-            extensions.Add(X509Extensions.CrlNumber, new X509Extension(false, new DerOctetString(new DerInteger(1))));
+            extensions.Add(X509Extensions.CrlNumber, new X509Extension(false, new DerOctetString(DerInteger.One)));
             extensions.Add(X509Extensions.IssuingDistributionPoint, new X509Extension(true, new DerOctetString(IssuingDistributionPoint.GetInstance(DerSequence.Empty))));
 
             X509Extensions ex = new X509Extensions(order, extensions);
diff --git a/crypto/test/src/asn1/test/OctetStringTest.cs b/crypto/test/src/asn1/test/OctetStringTest.cs
index 959d16c32..a0a97756b 100644
--- a/crypto/test/src/asn1/test/OctetStringTest.cs
+++ b/crypto/test/src/asn1/test/OctetStringTest.cs
@@ -125,7 +125,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 
 				using (var cGen = new BerSequenceGenerator(sGen.GetRawOutputStream(), 0, true))
 				{
-					cGen.AddObject(new DerInteger(0));
+					cGen.AddObject(DerInteger.Zero);
 
 					//
 					// AlgorithmIdentifier
diff --git a/crypto/test/src/asn1/test/OtherCertIDUnitTest.cs b/crypto/test/src/asn1/test/OtherCertIDUnitTest.cs
index 784df4146..395671c68 100644
--- a/crypto/test/src/asn1/test/OtherCertIDUnitTest.cs
+++ b/crypto/test/src/asn1/test/OtherCertIDUnitTest.cs
@@ -21,7 +21,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 			AlgorithmIdentifier algId = new AlgorithmIdentifier(new DerObjectIdentifier("1.2.2.3"));
 			byte[] digest = new byte[20];
 			OtherHash otherHash = new OtherHash(new OtherHashAlgAndValue(algId, digest));
-			IssuerSerial issuerSerial = new IssuerSerial(new GeneralNames(new GeneralName(new X509Name("CN=test"))), new DerInteger(1));
+			IssuerSerial issuerSerial = new IssuerSerial(new GeneralNames(new GeneralName(new X509Name("CN=test"))), DerInteger.One);
 
 			OtherCertID certID = new OtherCertID(otherHash);
 
diff --git a/crypto/test/src/asn1/test/ProcurationSyntaxUnitTest.cs b/crypto/test/src/asn1/test/ProcurationSyntaxUnitTest.cs
index 4a68cdb9d..eef402c48 100644
--- a/crypto/test/src/asn1/test/ProcurationSyntaxUnitTest.cs
+++ b/crypto/test/src/asn1/test/ProcurationSyntaxUnitTest.cs
@@ -22,7 +22,7 @@ namespace Org.BouncyCastle.Asn1.Tests
 			string country = "AU";
 			DirectoryString typeOfSubstitution = new DirectoryString("substitution");
 			GeneralName thirdPerson = new GeneralName(new X509Name("CN=thirdPerson"));
-			IssuerSerial certRef = new IssuerSerial(new GeneralNames(new GeneralName(new X509Name("CN=test"))), new DerInteger(1));
+			IssuerSerial certRef = new IssuerSerial(new GeneralNames(new GeneralName(new X509Name("CN=test"))), DerInteger.One);
 
 			ProcurationSyntax procuration = new ProcurationSyntax(country, typeOfSubstitution, thirdPerson);
 
diff --git a/crypto/test/src/asn1/test/TagTest.cs b/crypto/test/src/asn1/test/TagTest.cs
index e2f84dfb5..004893d25 100644
--- a/crypto/test/src/asn1/test/TagTest.cs
+++ b/crypto/test/src/asn1/test/TagTest.cs
@@ -103,7 +103,7 @@ namespace Org.BouncyCastle.Asn1.Tests
                 }
 			}
 
-			tagged = new DerTaggedObject(false, 34, new DerTaggedObject(true, 1000, new DerInteger(1)));
+			tagged = new DerTaggedObject(false, 34, new DerTaggedObject(true, 1000, DerInteger.One));
             if (!AreEqual(taggedInteger, tagged.GetEncoded()))
             {
                 Fail("incorrect encoding for implicit explicit tagged integer");
diff --git a/crypto/test/src/tsp/test/GenTimeAccuracyTest.cs b/crypto/test/src/tsp/test/GenTimeAccuracyTest.cs
index 01cc83d53..7f98f8167 100644
--- a/crypto/test/src/tsp/test/GenTimeAccuracyTest.cs
+++ b/crypto/test/src/tsp/test/GenTimeAccuracyTest.cs
@@ -10,10 +10,10 @@ namespace Org.BouncyCastle.Tsp.Tests
 	[TestFixture]
 	public class GenTimeAccuracyUnitTest
 	{
-		private static readonly DerInteger ZERO_VALUE = new DerInteger(0);
-		private static readonly DerInteger ONE_VALUE = new DerInteger(1);
-		private static readonly DerInteger TWO_VALUE = new DerInteger(2);
-		private static readonly DerInteger THREE_VALUE = new DerInteger(3);
+		private static readonly DerInteger ZERO_VALUE = DerInteger.Zero;
+		private static readonly DerInteger ONE_VALUE = DerInteger.One;
+		private static readonly DerInteger TWO_VALUE = DerInteger.Two;
+		private static readonly DerInteger THREE_VALUE = DerInteger.Three;
 
 		[Test]
 		public void TestOneTwoThree()