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4421 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) 4421 = 1! - 2! + 3! - 4! + 5! - 6! + 7! is prime. [Poo Sung]
Submitted: 2002-02-15 20:04:48; Last Modified: 2008-01-30 11:28:00.
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