2 989 409 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
541120752083251030623871	24	78.8	2021-02-25 16:29:18

ECM

Digits	B1	Curves
25	50000	56 / 280

Estimated T-Level: 21.0 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Tom Waskow	CE680D6ECB24E7B9	0
Verified (Factored)	1999-05-30	Iain Mckenna	CE680D6ECB24E7B9	913704
Verified (Factored)	2018-10-22	kkmrkkblmbrbk	CE680D6ECB24E7B9	1063942

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-02-26	mrh	66372FBC119A74AD	1	2821141	5	3

History

Date	User	Type	Result
2021-02-26	rucio	CERT	PRP Certification Proof certified good
2021-02-26	mrh	C-PRP	M2989409/541120752083251030623871 : 66372FBC119A74AD PRP proof power = 7 PRP: Verified Proof certified good
2021-02-25	daveward2005	F-ECM	Factor: 541120752083251030623871 / (ECM curve 4, B1=50000, B2=5000000, Sigma=5942340179852823)
2019-11-09	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2018-12-28	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-22	kkmrkkblmbrbk	C-LL	CE680D6ECB24E7B9
2017-12-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-10	Joss	NF-PM1	B1=396800, B2=3968000, E=6
2016-06-21	Joss	NF-PM1	B1=198400, B2=4050000, E=6
2016-02-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-06	lycorn	NF	no factor from 2^64 to 2^65
2015-02-06	lycorn	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-29	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-10-22	markr	NF-PM1	B1=100000, B2=2025000, E=6
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61