264

This number is a composite.

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264 is the only non-zero three-digit number whose sum of itself raised to itself and its right truncations minus one is prime. I.e., 264^264+264^26+264^2 - 1 is prime. [Opao]

Submitted: 2003-12-17 13:45:23; Last Modified: 2008-01-30 17:28:00.