55 493 563 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
302770551709636967279596431237539393266369	42	137.8	2018-02-01 04:28:22

Status	Date	User	Residue	Shift
Verified (Factored)	2013-02-02	-Anonymous-	D1514673EFC07778	47709754

P-1 factors

Date	Factor	B1	B2
2018-02-01	302770551709636967279596431237539393266369	1000000	20000000

History

Date	User	Type	Result
2018-02-01	Sid & Andy	F-PM1	Factor: 302770551709636967279596431237539393266369 / (P-1, B1=1000000, B2=20000000, E=6)
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^63
2016-01-29	-Anonymous-	NF	no factor from 2^72 to 2^73
2013-02-02	-Anonymous-	C-LL	D1514673EFC07778
2012-04-11	-Anonymous-	NF-PM1	B1=680000
2012-04-05	lycorn	NF	no factor from 2^71 to 2^72
2012-04-05	lycorn	NF	no factor from 2^70 to 2^71
2011-06-09	Chris Vernieri	NF	no factor from 2^69 to 2^70
2011-04-10	ITS	NF	no factor from 2^68 to 2^69
2009-05-23	RoaldS	NF	no factor from 2^67 to 2^68
2009-01-16	tmorrow	NF	no factor from 2^66 to 2^67
2009-01-15	tmorrow	NF	no factor from 2^65 to 2^66
2009-01-14	tmorrow	NF	no factor from 2^64 to 2^65
2009-01-13	1997rj7	NF	no factor from 2^63 to 2^64