1 940 957 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
7161290520331082137	19	62.6	2011-08-27 22:21:29
25635563205152620643239	23	74.4	2021-10-25 14:35:18

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	134 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Tom Cage	B8CDCA342A98E37D	0
Verified (Factored)	1998-02-19	Wayne Yeung	B8CDCA342A98E37D	0
Verified (Factored)	1999-01-10	Hal Sheller	B8CDCA342A98E37D	1816427

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	843930D6FDF5DA35	1	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	843930D6FDF5DA35	1	937648	1	3
Verified	2021-10-25	MarkS	8892F1EB91B106CF	2	1658456	5	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2021-10-25	Ben Delo	CERT	PRP Certification Proof certified good
2021-10-25	MarkS	C-PRP	M1940957/7161290520331082137/25635563205152620643239 : 8892F1EB91B106CF PRP proof power = 7 PRP: Verified Proof certified good
2021-10-25	MarkS	F-ECM	Factor: 25635563205152620643239 / (ECM curve 18, B1=50000, B2=5000000, Sigma=7981181712559005)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1940957/7161290520331082137 : 843930D6FDF5DA35 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1940957/7161290520331082137 : 843930D6FDF5DA35 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-08-27	GrunwalderGIMP	F-ECM	Factor: 7161290520331082137
2011-05-07	kurly	NF-PM1	B1=1000000, B2=30000000, E=12
2010-01-28	S485122	NF	no factor from 2^60 to 2^61