More information on this software may be found at:

• https://www.mersenneforum.org/node/58
• https://github.com/bbuhrow/yafu

Showing directory: /YAFU/v2.12/
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Which precompiled version should I use?

As of version 2.12, the following precompiled versions are available:

MSVC	ICCC
yafu-x64-sse41.exe yafu-x64-avx2.exe yafu-x64-avx512.exe yafu-x64-avx512-ifma.exe	yafu-x64-intel-sse41.exe yafu-x64-intel-avx2.exe yafu-x64-intel-avx512.exe yafu-x64-intel-avx512-ifma.exe

SSE41, AVX2, AVX512, and AVX512-IFMA refer to instruction set extensions that the versions respectively support.
SIQS, ECM, and YAFU's prime sieve all get progressively faster with more modern extensions.
See here for more information:
https://en.wikipedia.org/wiki/Advanced_Vector_Extensions
https://en.wikipedia.org/wiki/AVX-512#CPUs_with_AVX-512

The "Intel" versions are compiled with Intel C++ Compiler Classic and may be slightly faster than the equivalent MSVC-compiled version.
They should work on Zen4 or newer AMD CPUs (but possibly not older AMD).

Pick the best one that your CPU supports.

Roughly speaking:

• If you have an Ice Lake, Tiger Lake, Rocket Lake, or Sapphire Rapids CPU, use AVX512-IFMA.
• If you have an Intel SkylakeX or certain Cannon Lake or Cascade Lake CPUs, use AVX512.
• If you have an Intel Haswell CPU or newer (newer than 2013), use AVX2.
• If you have a Zen4 or Zen5 AMD CPU, use AVX512-IFMA.
• If you have another AMD CPU newer than 2015, use AVX2 (MSVC).
• Otherwise use SSE41.

Generated 2026-09-06 20:38:17