16843

This number is a prime.

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Among all the primes p < 12000000, p divides the numerator B(p-3), a Bernoulli number, only for 16843 and 2124679. Yet Jianqiang Zhao believes there exist infinitely many such primes. [Post]

Submitted: 2007-03-30 00:56:51; Last Modified: 2008-01-30 17:28:00.