This project runs for more than 20 years now and has always been carefully maintained. The implementation of these FFT’s in prime95 is handcoded in assembly by George Woltman, and is the most efficient implementation available. The prime95 software does multiplications of extreme high numbers using the Fast Fourier Transformation. Let the program run for some time and at some point, minutes or hours, the system will freeze.In the menu go to ‘Advanced | Test’ and fill in the number 14942209 in the box labeled ‘Exponent to test’.(If you want to familiarize yourself with the software use the readme, a background in math will be helpful, but is not needed.) Download and install Prime95 for Windows on a Skylake system from the website at.Example Intel Xeon E5-2600 V3 (Haswell-EP) AVX2 FMAįrom the Intel Communities forum discussing the bug (and cross-posted from ): One can see that the workloads targeted are the Fast Fourier Transforms (FFT) that the Prime95 users are generating. Here is the quick primer from Intel on what FMA is from the Haswell-EP slide deck. The bug manifests itself using some of the higher-end AVX/ FMA3 (Fuse Multiply Add) features in the chip for scientific purposes where the chips will freeze up after some time. Although the Intel Skylake generation (or 6th generation Core architecture generation) has been generally well received, we have heard news of a new bug with the chips.
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