9 673 361 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁹

TF target 2⁶⁸

Factored

Factor	Digits	Bits	Date
40888187735641597567	20	65.1	2015-04-30 21:50:39

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	Software
Factored	2000-10-28	Gustavo Felisberto	E19C76FBE001ED46	9475235	FreeBSD 32-bit,Prime95,v19,(aka WV6)
Factored	2001-06-09	Simon Pinches	E19C76FBE001ED46	2452838	Linux 32-bit,Prime95,v20,(aka WW2)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2019-10-10	mnd9	5D39B2B079DA245C	1	4588643	5	3
Verified	Certified Good	2020-12-21	storm5510	5D39B2B079DA245C	1	6277494	5	3

History

Date	User	Type	Result
2025-12-10	Mingye Wang	NF	no factor TF: 68-69
2020-12-21	George Woltman	CERT	Proof certified good
2020-12-21	storm5510	C-PRP	Proof Certified Good Proof Power: 8
2019-10-10	mnd9	C-PRP	M9673361/40888187735641597567 : 5D39B2B079DA245C
2015-04-30	VictordeHollander	F	Factor: 40888187735641597567 / TF: 65-66
2013-08-28	Nesowa	NF	no factor TF: 64-65
2001-06-09	Simon_Pinches	C-LL	E19C76FBE001ED46
2001-03-25	Simon_Pinches	NF-PM1	B1=115000, B2=1955000
2000-10-28	-anonymous-	C-LL	E19C76FBE001ED46
1999-06-26	korva	NF	no factor TF: 1-64