2 580 521 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
2186325326643242795597161	25	80.9	2021-03-15 04:00:51

ECM

Digits	B1	Curves
25	50000	105 / 280

Estimated T-Level: 21.9 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Christopher Lund	5F0B9EE4CABC3346	0
Verified (Factored)	1999-04-13	George S. Taylor	5F0B9EE4CABC3346	149434
Verified (Factored)	2018-06-19	kkmrkkblmbrbk	5F0B9EE4CABC3346	2254230

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-16	daveward2005	9A38ABBEB1F9B240	1	1033438	5	3

History

Date	User	Type	Result
2021-03-16	curtisc	CERT	PRP Certification Proof certified good
2021-03-16	daveward2005	C-PRP	M2580521/2186325326643242795597161 : 9A38ABBEB1F9B240 PRP proof power = 7 PRP: Verified Proof certified good
2021-03-15	daveward2005	F-ECM	Factor: 2186325326643242795597161 / (ECM curve 6, B1=50000, B2=5000000, Sigma=4529815146343669)
2019-06-28	lycorn	NF	no factor from 2^67 to 2^68
2018-06-19	kkmrkkblmbrbk	C-LL	5F0B9EE4CABC3346
2017-08-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-18	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
2013-09-08	Axelsson	NF	no factor from 2^62 to 2^63
2012-06-20	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-10-10	markr	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-12	Joss	NF-PM1	B1=50000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61