Regular Expression That Checks If a Number Is Prime (2016) (opens in new tab)

(iluxonchik.github.io)

4 pointsjagtodeath6y ago1 comments

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1 comments · 1 top-level

A python implementation of is_prime(n):

  return re.compile(r'^1?$|^(11+)\1+$').match('1' * n) is None

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