41312111

This number is a prime.

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The largest prime less than a googol formed by concatenating in descending order the first n consecutive multi-digit numbers ending with 1, i.e., (n=4), 41, 31, 21, 11. [Loungrides]

Submitted: 2013-09-07 11:16:32; Last Modified: 2018-02-21 23:05:38.