761

This number is a prime.

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761 = (π(7!) + π(6!) + π(1!)) - (π(7!₂) + π(6!₂) + π(1!₂))). Note that prime 761 is the only number with this property. [Firoozbakht]

Submitted: 2004-08-24 14:57:37; Last Modified: 2008-01-30 17:28:00.