661

This number is a prime.

Single Curio View: (Seek other curios for this number)

661 is the start of a record-breaking twin prime gap.

Submitted: 1999-11-10 00:25:20; Last Modified: 2008-01-30 17:19:23.

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell