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4 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) 4 is the smallest number n such that n and n! are product of factorials of primes (4 = 2!2! and 4! = 2!2!3!). [Capelle]
Submitted: 2008-02-27 15:42:35; Last Modified: 2008-02-27 21:46:41.
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