401

This number is a prime.

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The smallest prime that can be represented as the sum of products of first n pairs of consecutive positive even numbers plus 1, i.e., 2*4+6*8+10*12+14*16+1, (case n=4). [Loungrides]

Submitted: 2015-10-30 16:22:17; Last Modified: 2018-05-06 11:31:35.