May 2012: version 2.3

• The clmul instruction is detected and enabled at runtime so that the executable can run even when AVX instructions are not available. Same for popcnt.
• Maximum polynomial degree increased to 32767 bits.
• Add 'testprimitivity' command line option. This option causes the utility to test the passed polynomial and return 0 for not primitive.
• Add 'bma=' command line option for running the Berlekamp-Massey algorithm on a string of bits.
• Add an @response file option for passing commands through a text file. This is needed because the 'bma=' option can exceed the Windows command line length limit.
• Expanded factor file set allows operation on selected polynomial degrees beyond 1200.

Note: this version will automatically use the CLMUL instruction if both OS and processor AVX support is detected. OS version Windows 7 SP1 or later is required in order to benefit from AVX. Processors supporting AVX are Intel Sandy Bridge and AMD Bulldozer models.

source code

factor files - These are derived from a list from here, and reformatted with a utility. In addition, selected factorizations beyond the 2^1200 -1 cutoff of the Cunningham tables have been added. Unlike the factorizations through 2^1200-1, these additional factorizations do not come from a recognized source. Therefore, the primeness of these factors should be confirmed before using them.

sample build command for Microsoft 64-bit compiler.

sample win64 executable built with Microsoft compiler.