1091

This number is a prime.

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The smaller prime (emirp) in the first pair of invertible primes, (1091, 1601), whose concatenation, i.e., 10911601, is a strobogrammatic prime. [Loungrides]

Submitted: 2015-07-02 19:32:31; Last Modified: 2015-07-06 12:02:03.

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