256 391 287 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: 1 known prime factor

Factored

Factor	Digits	Bits	Date
67677044846722385377	20	65.9	2013-11-15 13:09:51

History

Date	User	Type	Result
2013-11-15	Nick	F	Factor: 67677044846722385377
2011-08-04	sasaki3	NF	no factor from 2^64 to 2^65
2010-03-08	Architects Cubed	NF	no factor from 2^63 to 2^64
2010-03-08	Architects Cubed	NF	no factor from 2^62 to 2^63

Username
Password