647 243 131 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: 2 known prime factors

Factored

Factor	Digits	Bits	Date
418546654138449690433	21	68.5	2016-09-15 03:58:30
424840618956269810561	21	68.5	2016-09-15 03:58:30

History

Date	User	Type	Result
2016-09-15	Nipal	F	Factor: 418546654138449690433 / TF: 67-70
2016-09-15	Nipal	F	Factor: 424840618956269810561 / TF: 67-70
2014-06-15	sasaki	NF	no factor from 2^66 to 2^67
2014-03-19	america64	NF	no factor from 2^65 to 2^66

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