11920...80451 (2164-digits)

This number is a prime.

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1973242146*5039#/35-1 is a titanic twin and Sophie Germain prime, since 1973242146*5039#/35+1 and 2*1973242146*5039#/35-1 are prime. [Rosenthal and Jobling]

Submitted: 2002-06-15 22:10:36; Last Modified: 2008-07-01 20:08:13.