16811891

This number is a prime.

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The smallest strobogrammatic prime, (emirp), concatenated from a pair of brilliant numbers, 1681=41^2 and 1891=31 x 61. Note that the concatenation in order of their distinct prime factors is also a prime, i.e., 314161. [Loungrides]

Submitted: 2018-12-20 03:44:12;   Last Modified: 2018-12-20 08:17:27.
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