This number is a composite.

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The only double-digit number n such that 3^n-R(n) is prime where R(n) is the reversal of n, i.e., 3^62-26 = 381520424476945831628649898783. [Loungrides]

Submitted: 2011-09-08 02:02:29;   Last Modified: 2018-12-11 10:20:16.
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