This number is a prime.

                                                           161666 8118999191

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The smallest strobogrammatic prime formed from the concatenation of a pair of 8-digit invertible primes, i.e., (16166681, 18999191). There is another one 16-digit such prime. Can you find it? [Loungrides]

Submitted: 2015-12-25 18:18:21;   Last Modified: 2018-03-08 20:26:21.
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