199

This number is a prime.

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In 1941, Molsen proved that for n equal to or greater than 199, the interval n < p less than or equal to (8/7)n always contains a prime of each of the forms 3x+1, 3x-1. [Post]

Submitted: 2009-09-14 17:29:20; Last Modified: 2009-09-15 00:21:47.