Primo for Linux 64-bit, version 4.0.0 alpha 15.
Primo is a primality proving program based on the ECPP (Elliptic Curve Primality Proving) algorithm. With Primo one can quickly check whether crypto-pseudoprimes are actually prime... or not.

New Primo record by Tom Wu : 15267 decimal digits!

The NX, ECB and CPG softwares are no more distributed.

Primo for Windows, version 3.0.9.1.

Factoring Class Polynomials over the Genus Field.
Changes:

All the references to the patent pending (WO/2005/004383) double-eta quotient invariants have been suppressed. The Internet links have been updated.

An unexpected use of Primo: http://hal.inria.fr/inria-00138382/en/.