11 871 337 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷³

TF target 2⁶⁸

P-1

B1 =	6189107
B2 =	185673210

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2001-04-29	Mark James	55A688A4425CB4D4	353261
Verified	2004-05-15	Todd Lewis	55A688A4425CB4D4	3399997

History

Date	User	Type	Result
2024-11-17	TheJudger	NF	no factor from 2^72 to 2^73
2022-10-01	Jon Pace	NF	no factor from 2^71 to 2^72
2021-10-20	mikr	NF	no factor from 2^70 to 2^71
2021-09-18	lycorn	NF	no factor from 2^69 to 2^70
2021-07-23	LaurV	NF-PM1	B1=6189107, B2=185673210
2018-01-15	ramgeis	NF	no factor from 2^68 to 2^69
2018-01-15	ramgeis	NF	no factor from 2^67 to 2^68
2016-02-15	VictordeHollander	NF	no factor from 2^66 to 2^67
2015-07-22	Sid & Andy	NF-PM1	B1=130000, B2=2210000, E=6
2013-11-02	Nesowa	NF	no factor from 2^65 to 2^66
2013-10-21	lycorn	NF	no factor from 2^64 to 2^65