1.0.0

.gitignore

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+.DS_Store
+/.build
+/Packages
+/*.xcodeproj

Package.swift

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+// swift-tools-version:5.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "BigInt",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "BigInt",
+            targets: ["BigInt"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "BigInt",
+            dependencies: []),
+        .testTarget(
+            name: "BigIntTests",
+            dependencies: ["BigInt"]),
+    ]
+)

README.md

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+<h3><b>Description</b></h3>
+
+The BigInt package provides arbitrary-precision integer arithmetic in Swift.
+It contains functionality comparable to that of the Java BigInteger class.
+
+BigInt requires Swift 5.0.
+
+
+<h3><b>Usage</b></h3>
+Using Swift Package Manager, in your projects Package.swift file add a dependency like<br>
+```
+dependencies: [
+// Dependencies declare other packages that this package depends on.
+.package(url: "https://github.com/leif-ibsen/BigInt", from: "1.0.0"),
+],
+```
+
+<h3><b>References</b></h3>
+
+Algorithms from the following books have been used in the implementation.
+There are references in the source code where appropriate.
+
+<ul>
+<li>Donald E. Knuth: Seminumerical Algorithms. Addison-Wesley 1971</li>
+<li>Crandall and Pomerance: Prime Numbers - A Computational Perspective. Second Edition, Springer 2005</li>
+<li>Henry S. Warren, Jr: Hacker's Delight. Second Edition, Addison-Wesley 2013</li>
+<li>Menezes, Oorschot, Vanstone: Handbook of Applied Cryptography. CRC Press 1996</li>
+</ul>
+
+
+<h3><b>Acknowledgement</b></h3>
+
+The BitSieve class used in the implementation is a translation to Swift of the corresponding class from Java BigInteger.
+The GCD algorithm and the Karatsuba and ToomCook multiplication algorithms are modelled after the corresponding algorithms in Java BigInteger.
+