17
This number is a prime.
Single Curio View: (Seek other curios for this number)
1!! + 2!! + ... + 15!! = 16 (mod 17). It is the only known prime with this property. [Firoozbakht]
Submitted: 2009-11-12 02:54:55; Last Modified: 2009-11-12 03:16:42.
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