Vedran Čačić <ved...@gmail.com> added the comment:
is_prime that's always correct is probably not the right thing to go into math.
Besides, now we have isqrt, it's just
n>1 and n&1 and all(n%d for d in range(3,isqrt(n)+1,2))
-- yes, it's damn slow, but so is everything else you want to be absolutely
correct. :-]
is_probable_prime is another matter, but there is an enormous amount of
bikeshedding about the API of that one.
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<https://bugs.python.org/issue39479>
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