42013

This number is a prime.

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The only prime less than a googol produced by the alternate placement of the positive numbers to the right and left of the zero, i.e., 0, 01, 201, 2013, 42013. [Loungrides]

Submitted: 2016-09-07 12:23:22; Last Modified: 2018-05-20 01:56:36.