2 647 321 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
2911139834869305856871	22	71.3	2020-07-14 09:09:35

ECM

Digits	B1	Curves
25	50000	35 / 280

Estimated T-Level: 20.6 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Danny van der Rijn	F37AC8B54738F409	0
Verified (Factored)	1999-04-02	Carl Mikkelsen	F37AC8B54738F409	1768669
Verified (Factored)	2018-07-16	kkmrkkblmbrbk	F37AC8B54738F409	2465637

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-16	Klaus Nordmann	813A227C610BE3AF	1	516943	5	3
Verified	2020-07-17	oodaira	813A227C610BE3AF	1	805589	5	3

History

Date	User	Type	Result
2020-07-17	oodaira	C-PRP	M2647321/2911139834869305856871 : 813A227C610BE3AF PRP: Verified PRP without proof (not generated)
2020-07-16	Klaus Nordmann	C-PRP	M2647321/2911139834869305856871 : 813A227C610BE3AF PRP: Verified PRP without proof (not generated)
2020-07-14	GAN	F-ECM	Factor: 2911139834869305856871 / (ECM curve 2, B1=50000, B2=5000000, Sigma=91852686575996)
2019-11-28	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-02-18	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-16	kkmrkkblmbrbk	C-LL	F37AC8B54738F409
2017-09-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-05-08	Joss	NF-PM1	B1=360000, B2=3600000, E=6
2016-12-29	Joss	NF-PM1	B1=206385
2016-12-27	Joss	NF-PM1	B1=171988
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-21	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-11	markr	NF	no factor from 2^61 to 2^62
2011-01-20	James Heinrich	NF-PM1	B1=180000, B2=4275000, E=6
2009-06-22	USAFSS	NF-PM1	B1=30000, B2=420000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61