2 986 253 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4112836695463103033887	22	71.8	2017-07-08 11:09:20

ECM

Digits	B1	Curves
25	50000	45 / 280

Estimated T-Level: 20.8 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-01-27	Marc Honey	392288DDF4667066	0
Verified (Factored)	1999-08-16	Michael Schmidt	392288DDF4667066	2304918

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	alpertron	02A76E2FF4C54A23	1	0	1	3
Verified	2017-11-18	Oliver Kruse	02A76E2FF4C54A23	1	598120	1	3

History

Date	User	Type	Result
2023-04-16	Kevin_9611	NF-PM1	B1=480000, B2=616887810
2017-11-18	Oliver Kruse	C-PRP	M2986253/4112836695463103033887 : 02A76E2FF4C54A23 PRP: Verified PRP without proof (not generated)
2017-09-28	alpertron	C-PRP	M2986253/4112836695463103033887 : 02A76E2FF4C54A23 PRP: Verified PRP without proof (not generated)
2017-07-10	Joss	NF-PM1	B1=396800, B2=3968000, E=6
2017-07-08	driveByUpgrades	F-ECM	Factor: 4112836695463103033887 / (ECM curve 1, B1=50000, B2=5000000)
2016-06-19	Joss	NF-PM1	B1=198400, B2=4050000, E=6
2016-02-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-11	lycorn	NF	no factor from 2^64 to 2^65
2015-04-11	lycorn	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-25	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-10-23	markr	NF-PM1	B1=100000, B2=2025000, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61