This number is a prime.

                                                       1008988681 1898868001

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The smallest 20-digit strobogrammatic prime formed from the concatenation of a pair of 10-digit invertible primes, i.e., (1008988681, 1898868001). [Loungrides]

Submitted: 2015-12-27 18:23:21;   Last Modified: 2018-04-05 11:07:23.
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