779693

This number is a prime.

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As of 2014, the only known prime p such that the sum of the first p composite numbers is a perfect square. [Honaker]

Submitted: 2015-01-20 03:20:31;   Last Modified: 2015-01-23 14:05:59.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell