2 783 687 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
3802112810550386161441	22	71.7	2021-01-31 04:42:13

ECM

Digits	B1	Curves
25	50000	67 / 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)		Pauli Viljamaa	6B1D7EC88C5A1E4E	0
Verified (Factored)	1999-05-30	David Marchant	6B1D7EC88C5A1E4E	2686215
Verified (Factored)	2018-08-26	kkmrkkblmbrbk	6B1D7EC88C5A1E4E	1307481

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-01-31	ViliamF	24B7FEB97BDF7601	1	173837	5	3

History

Date	User	Type	Result
2021-01-31	ky0uraku	CERT	PRP Certification Proof certified good
2021-01-31	ViliamF	C-PRP	M2783687/3802112810550386161441 : 24B7FEB97BDF7601 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-31	daveward2005	F-ECM	Factor: 3802112810550386161441 / (ECM curve 6, B1=50000, B2=5000000, Sigma=8865422939430890)
2019-11-14	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-02-25	chuenkit	NF	no factor from 2^67 to 2^68
2018-08-26	kkmrkkblmbrbk	C-LL	6B1D7EC88C5A1E4E
2017-10-16	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-02	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=123057
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-01	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-25	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-11	Joss	NF-PM1	B1=15000
2009-01-28	Sturle Sunde	NF	no factor from 2^60 to 2^61