2 297 987 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
6489726410696687751617	22	72.5	2020-04-25 08:06:40

ECM

Digits	B1	Curves
25	50000	57 / 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)		Steve Sommars	9A6DE5C81A5063BD	0
Verified (Factored)	1999-02-21	David Underbakke	9A6DE5C81A5063BD	1121387
Verified (Factored)	2018-04-30	kkmrkkblmbrbk	9A6DE5C81A5063BD	1529667

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-04-25	M Miller	08B19DAB7C475E5C	1	1022436	5	3
Verified	2020-04-27	arnaud	08B19DAB7C475E5C	1	1975781	5	3

History

Date	User	Type	Result
2023-05-13	This -Anonymous-	NF-PM1	B1=800000, B2=40000000, E=12
2020-04-27	arnaud	C-PRP	M2297987/6489726410696687751617 : 08B19DAB7C475E5C PRP: Verified PRP without proof (not generated)
2020-04-25	M Miller	C-PRP	M2297987/6489726410696687751617 : 08B19DAB7C475E5C PRP: Verified PRP without proof (not generated)
2020-04-25	nordi	F-ECM	Factor: 6489726410696687751617 / (ECM curve 3, B1=50000, B2=5000000, Sigma=952049145851122)
2019-03-25	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-30	kkmrkkblmbrbk	C-LL	9A6DE5C81A5063BD
2017-05-27	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-11-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-12	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-12	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-11-15	c10ck3r	NF-PM1	B1=500000, B2=10000000, E=12
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-12	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-17	Oscar Östlin	NF-PM1	B1=90000, B2=1755000, E=6
2010-12-04	Oscar Östlin	NF-PM1	B1=75011
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-07	Joss	NF-PM1	B1=15000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61