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The winner of a fastest-code challenge is determined by the runtime performance of the submissions. For fairness, all submissions should be benchmarked on the same machine, which usually means all submissions have to be tested by the host of the challenge. For scoring by asymptotic time complexity, use [fastest-algorithm] instead.

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Fortran: 316x Okay, Fortran: I've got it up to 106x 155x 160x 316x speedup when using an Xorshift RNG and OpenMP on a 4 core i7 CPU. Other than that, there are no big tricks. For the iterator to cons …
answered Apr 30 '14 by semi-extrinsic
1
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Python 3, advanced algo by Peter Luschny: 8.25x (1 280 000/155 000) Shamelessly copied from Peter Luschny, http://www.luschny.de/math/factorial/FastFactorialFunctions.htm, who provides this code unde …
answered May 8 '14 by semi-extrinsic
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Fortran: n=12 I just made a quick'n'dirty version in Fortran, no optimizations except OpenMP. It should squeeze in at just below 10 minutes for n=12 on the OPs machine, it takes 10:39 on my machine w …
answered May 2 '14 by semi-extrinsic