65

This number is a composite.

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The reversal of 65^56 is prime.

Copy and paste RevDigits(65^RevDigits(65,10),10) into the 'Value space' at Alpertron (integer factorization calculator) then click on the 'Prime box' to display this 102-digit number. Can you find a larger prime of this form? [Honaker]

Submitted: 2022-01-21 12:29:11;   Last Modified: 2022-01-21 18:23:53.
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