2 665 343 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
246437564326948782329	21	67.7	2011-02-03 16:24:39

ECM

Digits	B1	Curves
25	50000	100 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		James Griffin	5FCF6322C0596E77	0
Verified (Factored)	1999-05-16	Douglas B. Killings	5FCF6322C0596E77	2603137

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-18	Oliver Kruse	1F97C5684CFAFA20	1	1673897	5	3
Verified	2017-12-03	kkmrkkblmbrbk	1F97C5684CFAFA20	1	519453	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-03	kkmrkkblmbrbk	C-PRP	M2665343/246437564326948782329 : 1F97C5684CFAFA20 PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2665343/246437564326948782329 : 1F97C5684CFAFA20 PRP: Verified PRP without proof (not generated)
2011-02-03	markr	F-PM1	Factor: 246437564326948782329
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61