53300...00001 (6659-digits)

This number is a prime.

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9985*720^2329+1 is prime. Note that 9985 is a Chiliagonal number and 720=6!. Also the sum of digits as well as the sum of squared digits of 9985*720^2329+1 are both prime. [Earls]

Submitted: 2004-09-03 13:41:35; Last Modified: 2014-08-09 20:58:22.