1 872 553 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
75089653991269027529	20	66.0	2012-01-10 17:01:03

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)		Joel Smith	FAA703E379F82395	0
Verified (Factored)	1998-12-27	Roger Smith	FAA703E379F82395	1656165

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	41F4E83E99EAF175	1	0	1	3
Verified	2017-11-07	kkmrkkblmbrbk	41F4E83E99EAF175	1	716637	1	3

History

Date	User	Type	Result
2017-11-07	kkmrkkblmbrbk	C-PRP	M1872553/75089653991269027529 : 41F4E83E99EAF175 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1872553/75089653991269027529 : 41F4E83E99EAF175 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2012-01-10	markr	F-PM1	Factor: 75089653991269027529
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-11	Architects Cubed	NF	no factor from 2^60 to 2^61