2 614 849 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
63843736728488537916737	23	75.8	2020-11-25 14:58:15

ECM

Digits	B1	Curves
25	50000	86 / 280

Estimated T-Level: 21.5 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Stephan Grupp	7DFC25E44EA4FFD8	0
Verified (Factored)	1999-03-26	Ethan Hansen	7DFC25E44EA4FFD8	1384339
Verified (Factored)	2018-07-01	kkmrkkblmbrbk	7DFC25E44EA4FFD8	646256

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-11-25	ee33t1	4EA21EFDB0272F00	1	725220	5	3

History

Date	User	Type	Result
2020-11-25	curtisc	CERT	PRP Certification Proof certified good
2020-11-25	ee33t1	C-PRP	M2614849/63843736728488537916737 : 4EA21EFDB0272F00 PRP proof power = 7 PRP: Verified Proof certified good
2020-11-25	daveward2005	F-ECM	Factor: 63843736728488537916737 / (ECM curve 6, B1=50000, B2=5000000)
2019-10-06	masser	NF-PM1	B1=2614849, B2=26148490, E=12
2019-04-22	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-01	kkmrkkblmbrbk	C-LL	7DFC25E44EA4FFD8
2017-08-30	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-23	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-12	Joss	NF-PM1	B1=124546
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-24	markr	NF	no factor from 2^61 to 2^62
2010-12-13	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61