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Problem 1096. Largest Twin Primes

Created by Des Mc Manus

Twin primes are primes p1, p2 = p1 + 2 such that both p1 and p2 are prime numbers. Given a positive integer N (>=5) what are the largest twin primes (in order) <= N. For example, if N = 20 then p1 = 17 and p2 = 19.

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83 correct solutions 34 incorrect solutions
Last solution submitted on Mar 20, 2015

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