2 786 573 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
686383868345369295333182383	27	89.1	2021-04-12 11:18:50

ECM

Digits	B1	Curves
25	50000	89 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Charley Kline	5246F24915FA5F68	0
Verified (Factored)		Corey Cole	5246F24915FA5F68	0
Verified (Factored)	1999-05-02	Jeff Luebke	5246F24915FA5F68	1037539

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-04-13	M8909387	3AFC2ED40B6B8CC7	1	1986487	5	3

History

Date	User	Type	Result
2021-04-13	GAN	CERT	PRP Certification Proof certified good
2021-04-13	M8909387	C-PRP	M2786573/686383868345369295333182383 : 3AFC2ED40B6B8CC7 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-12	daveward2005	F-ECM	Factor: 686383868345369295333182383 / (ECM curve 7, B1=50000, B2=5000000, Sigma=5401197204375164)
2019-11-15	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-02-26	chuenkit	NF	no factor from 2^67 to 2^68
2017-10-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-04	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-28	Joss	NF-PM1	B1=123033
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-11	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-24	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-11	Joss	NF-PM1	B1=15000
2009-01-29	Sturle Sunde	NF	no factor from 2^60 to 2^61