2 951 537 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
31277910931522250833	20	64.8	old

ECM

Digits	B1	Curves
25	50000	106 / 280

Estimated T-Level: 21.9 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Andrew Haveland-Robinson	F9826ED44BCE84A3	0
Verified (Factored)	1999-09-14	Ed Brown	F9826ED44BCE84A3	1741404

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-25	Oliver Kruse	6D85828C9E107DE1	1	2928537	5	3
Verified	2017-12-09	kkmrkkblmbrbk	6D85828C9E107DE1	1	2044023	5	3

History

Date	User	Type	Result
2023-02-12	USAFSS	NF-PM1	B1=360000, B2=298405800
2017-12-09	kkmrkkblmbrbk	C-PRP	M2951537/31277910931522250833 : 6D85828C9E107DE1 PRP: Verified PRP without proof (not generated)
2017-10-25	Oliver Kruse	C-PRP	M2951537/31277910931522250833 : 6D85828C9E107DE1 PRP: Verified PRP without proof (not generated)