2196

This number is a composite.

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(2⁷³³¹ - 1)/458072843161 is prime. This number has 2196 decimal digits and set a new record in 1997 for general purpose primality proving. It required 1 month of CPU on an Alpha 400 MHz. [Mayer and Morain]

Submitted: 1999-10-06 00:46:51; Last Modified: 2009-05-26 19:42:29.