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by rneufeld 5288 days ago
I can't guarantee the correctness of the implementation, but a friend (burke on HN, I believe) and I wrote a version of the Miller-Rabin primality test in Ruby & C that you may want to use as reference.

IIRC numbers under 341,550,071,728,321 could be accurately tested for primality on the "instant" timescale.

See the repo on github: https://github.com/rkneufeld/mr_prime/blob/master/lib/mr_pri...