3 912 221 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
3081408684031788137	19	61.4	2009-10-14 09:54:36

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-07-05	Martyn Lycett	F63E8A9CE487399A	0
Verified (Factored)	1999-09-30	The Prime Hunters	F63E8A9CE487399A	1677739

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	9C4DC4B4DFA0DB12	1	0	1	3
Verified	2017-12-29	Oliver Kruse	9C4DC4B4DFA0DB12	1	2595413	1	3

History

Date	User	Type	Result
2022-05-26	Joss	NF-PM1	B1=100000, B2=130364850
2022-03-22	Joss	NF-PM1	B1=100000
2022-03-04	Joss	NF-PM1	B1=90000
2017-12-29	Oliver Kruse	C-PRP	M3912221/3081408684031788137 : 9C4DC4B4DFA0DB12 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M3912221/3081408684031788137 : 9C4DC4B4DFA0DB12 PRP: Verified PRP without proof (not generated)
2009-10-14	Smurgs	F-ECM	Factor: 3081408684031788137
2009-07-10	Carsten Kossendey	NF-PM1	B1=20000, B2=285000
2008-12-26	Architects Cubed	NF	no factor from 2^60 to 2^61