2 096 449 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
46121879	8	25.5	old
156378323809	12	37.2	2008-07-15 07:50:13
297896183287532129	18	58.0	2015-08-05 11:35:32
667711392887138963171911	24	79.1	2016-01-21 22:47:51

ECM

Digits	B1	Curves
25	50000	124 / 280

Estimated T-Level: 22.2 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	EE894E600B199CC5	4	0	1	3
Verified	2017-10-21	Oliver Kruse	EE894E600B199CC5	4	1918205	1	3

P-1 factors

Date	Factor	B1	B2
2016-01-21	667711392887138963171911	500000	15000000

History

Date	User	Type	Result
2017-10-21	Oliver Kruse	C-PRP	M2096449/46121879/156378323809/297896183287532129/667711392887138963171911 : EE894E600B199CC5 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2096449/156378323809/297896183287532129/46121879/667711392887138963171911 : EE894E600B199CC5 PRP: Verified PRP without proof (not generated)
2016-01-21	alpertron	F-PM1	Factor: 667711392887138963171911 / (P-1, B1=500000, B2=15000000, E=12)
2015-08-05	TJAOI	F	Factor: 297896183287532129 / TF: 58-59
2008-07-15	J Feitsma	F	Factor: 156378323809