2 881 427 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
7622849730196809457	19	62.7	2011-02-25 05:51:30

ECM

Digits	B1	Curves
25	50000	223 / 280

Estimated T-Level: 24.0 ⓘ

TF below 2^75 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	6689C118C0242E78	0
Verified (Factored)	1999-06-06	Derrick Coetzee	6689C118C0242E78	458032

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-23	Oliver Kruse	8F064E37D38FBC1B	1	1648197	5	3
Verified	2017-12-08	kkmrkkblmbrbk	8F064E37D38FBC1B	1	2158267	5	3

History

Date	User	Type	Result
2023-04-16	Kevin_9611	NF-PM1	B1=240000, B2=279852300
2017-12-08	kkmrkkblmbrbk	C-PRP	M2881427/7622849730196809457 : 8F064E37D38FBC1B PRP: Verified PRP without proof (not generated)
2017-10-23	Oliver Kruse	C-PRP	M2881427/7622849730196809457 : 8F064E37D38FBC1B PRP: Verified PRP without proof (not generated)
2011-02-25	Carsten Kossendey	F	Factor: 7622849730196809457
2010-12-24	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=161250
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61