3137
This number is a prime.
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The only prime formed from the ordered concatenation of two 2-digit successive emirps, i.e., 31, 37, so that the ordered concatenation of their reversals, i.e., 1373, is also prime. [Loungrides]
Submitted: 2017-12-13 17:20:54; Last Modified: 2022-11-17 11:46:46.
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