This number is a prime.

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(337, 373) is the only known case of a pair of primes formed by concatenating in order and reverse order the prime factors of a repunit number, R3=111, (111=3*37=37*3). [Loungrides]

Submitted: 2015-10-09 09:21:17;   Last Modified: 2018-10-24 06:47:15.
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