46931...13377 (23-digits)

This number is a prime.

                                                   469 3163567786 4055013377

Single Curio View:   (Seek other curios for this number)
The first known factor of F31 was discovered on April 12, 2001, by A. Kruppa using a sieving program developed by T. Forbes. (The Fermat numbers grow so fast that our only hope of showing them not prime is by finding a factor.)

Submitted: 2001-04-14 13:30:44;   Last Modified: 2009-01-23 03:25:52.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell