41

This number is a prime.

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The largest of three consecutive primes (p, q, r), such that r|(pq+1), i.e., 41 divides (31*37+1). Note that the quotient is a perfect number. [Loungrides]

Submitted: 2013-05-03 10:32:21; Last Modified: 2013-05-03 10:43:51.