10012345678901

This number is a prime.

1001 2345678901

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The smallest emirp formed by inserting the digit sequence, 0123456789, in between a double-digit number and its reversal, i.e. between 10 and 01. [Loungrides]

Submitted: 2015-09-28 09:17:08; Last Modified: 2018-12-10 14:50:35.