911 298 389 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
256721511520669446617	21	67.8	2015-12-12 20:53:57

History

Date	User	Type	Result
2015-12-12	Conductor	F	Factor: 256721511520669446617 / TF: 67-68
2015-03-20	BJB	NF	no factor from 2^66 to 2^67
2011-10-24	lalera	NF	no factor from 2^64 to 2^66
2010-06-30	linded	NF	no factor from 2^63 to 2^64

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