This number is a composite.
Single Curio View: (Seek other curios for this number)604 is the only three-digit number whose sum of its single and double factorials plus one is prime. I.e., 604! + 604!2 + 1 is prime. [Opao]
Submitted: 2003-11-06 00:03:47; Last Modified: 2008-01-30 11:28:00.
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