44441...99999 (157-digits)

This number is a prime.

4444105 4973306739
3722377327 8869842880 5102842030 6579149850 4426852153 2190472966 6264804483
1617912215 1564882713 2956320113 1345294533 8531839999 9999999999 9999999999

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In late 2003, Professor W. Edwin Clark of the University of South Florida discovered that (100!-21)/21 is prime. [Dobb]

Submitted: 2003-12-08 09:27:36; Last Modified: 2008-08-13 17:53:19.