779693
This number is a prime.
As of 2014, the only known prime p such that the sum of the first p composite numbers is a perfect square. [Honaker]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
As of 2014, the only known prime p such that the sum of the first p composite numbers is a perfect square. [Honaker]