+ * Revision 1.4 2004/04/01 13:37:07 mdw
+ * Keep numbers positive.
+ *
+ * Revision 1.3 2004/03/23 15:19:32 mdw
+ * Test elliptic curves more thoroughly.
+ *
+ * Revision 1.2 2004/03/21 22:52:06 mdw
+ * Merge and close elliptic curve branch.
+ *
+ * Revision 1.1.4.2 2004/03/20 00:13:31 mdw
+ * Projective coordinates for prime curves
+ *