977 363 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
4467211460612712025031	22	71.9	2014-01-07 14:11:59

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Alex and Nick Myrman	3275	0
Verified (Factored)		David Slowinski	1275	0
Verified (Factored)		Paul Victor Novarese	03185CEDA3FCB275	0
Verified (Factored)		Claude Barbe	03185CEDA3FCB275	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	0B5716D6DBC7E7C6	1	0	1	3
Verified	2017-10-15	kkmrkkblmbrbk	0B5716D6DBC7E7C6	1	162599	1	3
Verified	2020-04-24	Oliver Kruse	D7B3B348C8270309	1	824182	5	3
Verified	2025-05-30	kkmrkkblmbrbk	D7B3B348C8270309	1	364575	5	3

History

Date	User	Type	Result
2025-05-30	Chun sung soo	CERT	PRP Certification Proof certified good
2025-05-30	kkmrkkblmbrbk	C-PRP	M977363/4467211460612712025031 : D7B3B348C8270309 PRP proof power = 6 PRP: Verified Proof certified good
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2020-04-24	Oliver Kruse	C-PRP	M977363/4467211460612712025031 : D7B3B348C8270309 PRP: Verified PRP without proof (small exponent)
2017-10-15	kkmrkkblmbrbk	C-PRP	M977363/4467211460612712025031 : 0B5716D6DBC7E7C6 PRP: Verified PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M977363/4467211460612712025031 : 0B5716D6DBC7E7C6 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=200000, B2=5000000, E=6
2014-01-07	Ryan Schulz	F-ECM	Factor: 4467211460612712025031
2013-10-13	David Campeau	NF-PM1	B1=830000, B2=24900000, E=12
2012-02-06	Joss	NF-PM1	B1=684468
2011-06-19	Joss	NF-PM1	B1=400000
2011-06-01	Joss	NF-PM1	B1=200000
2010-05-15	Architects Cubed	NF	no factor from 2^60 to 2^61