1 606 837 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
66288025951311074910463	23	75.8	2013-02-06 01:28:56
1190932859685127848369877871	28	89.9	2015-04-19 14:44:15

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)		John Lloyd	B23FD7805B48B7C2	0
Verified (Factored)	1998-12-27	Eric Hahn	B23FD7805B48B7C2	187318

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	kkmrkkblmbrbk	631CC4C30D74C761	2	0	1	3
Verified	2017-11-13	ATH	631CC4C30D74C761	2	225751	1	3

P-1 factors

Date	Factor	B1	B2
2015-04-19	1190932859685127848369877871	500000	15000000

History

Date	User	Type	Result
2017-11-13	ATH	C-PRP	M1606837/66288025951311074910463/1190932859685127848369877871 : 631CC4C30D74C761 PRP: Verified PRP without proof (not generated)
2017-10-04	kkmrkkblmbrbk	C-PRP	M1606837/66288025951311074910463/1190932859685127848369877871 : 631CC4C30D74C761 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1606837/66288025951311074910463/1190932859685127848369877871 : 631CC4C30D74C761 PRP without proof (not generated)
2015-04-19	alpertron	F-PM1	Factor: 1190932859685127848369877871 / (P-1, B1=500000, B2=15000000, E=12)
2013-02-06	Jacques MOLNE	F-ECM	Factor: 66288025951311074910463
2011-11-10	BigBrother	NF-PM1	B1=100000, B2=2000000, E=6
2010-07-12	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-05-02	Architects Cubed	NF	no factor from 2^60 to 2^61