19

This number is a prime.

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The third term of the sequence where 2^2*3^3*...*a(n)^a(n) + 1 is prime, a(n) is prime, a(n)>a(n-1), and a(n) is minimal. [Honaker]

Submitted: 2015-01-29 20:52:32; Last Modified: 2018-12-28 21:14:53.