641

This number is a prime.

Single Curio View:   (Seek other curios for this number)
641 = 42 + 252 = 24 + 54 = (12 + 12)4 + (12 + 22)4. [Melo]

Submitted: 1999-09-22 20:12:53;   Last Modified: 2008-01-30 11:28:00.
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