2 357 591 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
4087929609254041005558073	25	81.8	2020-07-04 14:55:13

ECM

Digits	B1	Curves
25	50000	66 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Dr. Larry J. Paden	02708CC65C6F1B61	0
Verified (Factored)	1999-05-09	Paul Morriss	02708CC65C6F1B61	1748667
Verified (Factored)	2018-05-10	kkmrkkblmbrbk	02708CC65C6F1B61	432422

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-05	Christoph Zenger	4A26E020294C4772	1	2049830	5	3
Verified	2020-07-05	oodaira	4A26E020294C4772	1	282641	5	3

History

Date	User	Type	Result
2020-07-05	oodaira	C-PRP	M2357591/4087929609254041005558073 : 4A26E020294C4772 PRP: Verified PRP without proof (not generated)
2020-07-05	Christoph Zenger	C-PRP	M2357591/4087929609254041005558073 : 4A26E020294C4772 PRP: Verified PRP without proof (not generated)
2020-07-04	GAN	F-ECM	Factor: 4087929609254041005558073 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3163199420798513)
2019-04-29	TJAOI	NF	no factor from 2^67 to 2^68
2018-05-10	kkmrkkblmbrbk	C-LL	02708CC65C6F1B61
2017-06-13	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
2015-10-28	ramgeis	NF	no factor from 2^65 to 2^66
2015-08-09	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-22	Joss	NF-PM1	B1=144450
2014-08-07	Joss	NF-PM1	B1=117225
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-29	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-23	Oscar Östlin	NF-PM1	B1=90000, B2=1822500, E=6
2010-12-22	Oscar Östlin	NF-PM1	B1=75011
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-17	Sturle Sunde	NF	no factor from 2^60 to 2^61