19735...46657 (27-digits)

This number is a prime.

1973525 8702407697 3231046657

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The second smallest (after 65537) generalized Fermat prime b^(2^n)+1 with n = 4.

Submitted: 2004-01-08 08:17:10; Last Modified: 2008-01-30 17:28:00.