1 646 101 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
667440073404158295855463	24	79.1	2011-09-22 02:49:25

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Fred	F4DED17CF261C4E8	0
Verified (Factored)	1998-12-06	Paul Victor Novarese	F4DED17CF261C4E8	281630

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-02	Oliver Kruse	D025FDBBABB7C364	1	0	1	3
Verified	2017-11-02	kkmrkkblmbrbk	D025FDBBABB7C364	1	1200375	1	3

History

Date	User	Type	Result
2017-11-02	kkmrkkblmbrbk	C-PRP	M1646101/667440073404158295855463 : D025FDBBABB7C364 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1646101/667440073404158295855463 : D025FDBBABB7C364 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-09-22	Dmitry B. Khachaturov	F-ECM	Factor: 667440073404158295855463
2010-08-03	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-29	Architects Cubed	NF	no factor from 2^60 to 2^61