647

This number is a prime.

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The only prime of form p^(p+1)+q^(q+1)-1, where p, q are consecutive primes, i.e., 2^3*3^4-1. [Loungrides]

Submitted: 2016-03-17 01:33:04;   Last Modified: 2018-12-22 19:30:44.
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