2 240 647 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
766448172026449303199	21	69.4	2021-02-12 06:07:31

ECM

Digits	B1	Curves
25	50000	138 / 280

Estimated T-Level: 22.5 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		nphan	188F297D5C536810	0
Verified (Factored)	1999-02-21	Andrey Pivovarov	188F297D5C536810	174412
Verified (Factored)	2018-04-21	kkmrkkblmbrbk	188F297D5C536810	1734994

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-02-12	ViliamF	2CA30A7A7913727E	1	420152	5	3

History

Date	User	Type	Result
2021-02-13	Ben Delo	CERT	PRP Certification Proof certified good
2021-02-12	ViliamF	C-PRP	M2240647/766448172026449303199 : 2CA30A7A7913727E PRP proof power = 7 PRP: Verified Proof certified good
2021-02-12	daveward2005	F-ECM	Factor: 766448172026449303199 / (ECM curve 4, B1=50000, B2=5000000, Sigma=5188316702393206)
2019-04-01	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-21	kkmrkkblmbrbk	C-LL	188F297D5C536810
2016-12-29	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
2016-01-17	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-12-03	Alexander Dubrovin	NF-PM1	B1=1000000, B2=6000000, E=6
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-08-25	-Anonymous-	NF-PM1	B1=128645
2013-08-21	David Campeau	NF	no factor from 2^62 to 2^63
2012-05-03	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-08	markr	NF-PM1	B1=100000, B2=2050000, E=6
2010-11-10	Joss	NF-PM1	B1=30000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61