20 489 611 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
129583117728183271391	21	66.8	2015-02-27 00:01:25

Status	Date	User	Residue	Shift
Verified (Factored)	2004-11-22	Trung Nguyen	13BB06700386CB4B	12649492
Verified (Factored)	2008-03-06	Dario Pascual	13BB06700386CB4B	5882745

History

Date	User	Type	Result
2022-04-11	LordJulius	NF	no factor from 2^67 to 2^68
2015-02-27	NR	F	Factor: 129583117728183271391 / TF: 66-67*

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