2 578 489 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
4498081079590095627983	22	71.9	2020-07-29 17:11:23

ECM

Digits	B1	Curves
25	50000	50 / 280

Estimated T-Level: 20.9 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		David Metcalfe	7B03A43237FF0B3A	0
Verified (Factored)	1999-04-13	Charles Dorian	7B03A43237FF0B3A	1297978
Verified (Factored)	2018-06-18	kkmrkkblmbrbk	7B03A43237FF0B3A	1371123

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-29	ATH	685EAC7A093536FA	1	889601	5	3

History

Date	User	Type	Result
2020-08-01	Kriesel	CERT	PRP Certification Proof certified good
2020-07-29	ATH	C-PRP	M2578489/4498081079590095627983 : 685EAC7A093536FA PRP proof power = 7 PRP: Verified Proof certified good
2020-07-29	GAN	F-ECM	Factor: 4498081079590095627983 / (ECM curve 2, B1=50000, B2=5000000, Sigma=916870240348255)
2019-07-09	lycorn	NF	no factor from 2^67 to 2^68
2018-06-18	kkmrkkblmbrbk	C-LL	7B03A43237FF0B3A
2017-08-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-12	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-19	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-10-09	markr	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-11	Joss	NF-PM1	B1=50000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61