19

This number is a prime.

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The first prime of form (pqrs-1)/t where p, q, r, s, t are consecutive primes, case (2, 3, 5, 7, 11). Note that it is the only known prime of this form. [Loungrides]

Submitted: 2011-07-13 20:13:19; Last Modified: 2019-01-30 22:45:21.