13352...00001 (5941-digits)

This number is a prime.

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3^6223*10^(L+1)+1 is prime, where L is the number of digits of 3^6223. Note that the digital sum of this number is also prime. [Earls]

Submitted: 2004-08-09 11:23:29; Last Modified: 2008-01-30 17:28:00.