--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.runtime/src/com/oracle/truffle/ruby/runtime/core/RubyBignum.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.runtime.core;
+
+import java.math.*;
+
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.array.*;
+import com.oracle.truffle.ruby.runtime.objects.*;
+
+/**
+ * Represents the Ruby {@code Bignum} class.
+ */
+public class RubyBignum extends RubyObject implements Unboxable {
+
+    private final BigInteger value;
+
+    public RubyBignum(RubyClass bignumClass, BigInteger value) {
+        super(bignumClass);
+
+        assert value != null;
+
+        this.value = value;
+    }
+
+    public BigInteger getValue() {
+        return value;
+    }
+
+    public Object unbox() {
+        return value;
+    }
+
+    public static RubyArray divMod(RubyContext context, BigInteger a, BigInteger b) {
+        final BigInteger[] quotientRemainder = a.divideAndRemainder(b);
+
+        final Object quotient = GeneralConversions.fixnumOrBignum(quotientRemainder[0]);
+        final Object remainder = GeneralConversions.fixnumOrBignum(quotientRemainder[1]);
+
+        final ObjectImmutablePairArrayStore store = new ObjectImmutablePairArrayStore(quotient, remainder);
+        return new RubyArray(context.getCoreLibrary().getArrayClass(), store);
+    }
+
+    @Override
+    public int hashCode() {
+        return value.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof RubyBignum)) {
+            return false;
+        }
+        RubyBignum other = (RubyBignum) obj;
+        if (value == null) {
+            if (other.value != null) {
+                return false;
+            }
+        } else if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return value.toString();
+    }
+
+}