1210864201

This number is a prime.

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The only emirp less than a googol formed by concatenating in descending order the first n consecutive even numbers followed by an odd digit, (n=7), i.e., 12, 10, …, 0, 1. [Loungrides]

Submitted: 2012-10-27 10:07:23; Last Modified: 2018-02-24 14:10:55.