2 785 037 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
33809804810808262153	20	64.9	2015-03-18 12:36:02

ECM

Digits	B1	Curves
25	50000	111 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-09-13	Tom Cage	40AA47ECDB1A6BAF	0
Verified (Factored)	1998-10-18	Brian Robinson	40AA47ECDB1A6BAF	0
Verified (Factored)	1999-05-02	Troy Marshall	40AA47ECDB1A6BAF	767755

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-21	Oliver Kruse	352356F0919330C2	1	2517015	5	3
Verified	2017-12-06	kkmrkkblmbrbk	352356F0919330C2	1	2137113	5	3

History

Date	User	Type	Result
2023-02-26	USAFSS	NF-PM1	B1=300000, B2=235127970
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2017-12-06	kkmrkkblmbrbk	C-PRP	M2785037/33809804810808262153 : 352356F0919330C2 PRP: Verified PRP without proof (not generated)
2017-10-21	Oliver Kruse	C-PRP	M2785037/33809804810808262153 : 352356F0919330C2 PRP: Verified PRP without proof (not generated)
2015-03-18	Jason U	F-ECM	Factor: 33809804810808262153 / (ECM curve 1, B1=50000, B2=5000000)
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-09	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-02-01	Sturle Sunde	NF	no factor from 2^60 to 2^61