7 012 507 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 2⁶⁷

Factored

Factor	Digits	Bits	Date
485936040797094641233	21	68.7	2020-05-01 08:51:03

ECM

Digits	B1	Curves
25	50000	6 / 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	1999-04-02	Blaine Deal	0FACB484677B45B9	0	Windows,Prime95,v16,NT service,(aka WS5)
Factored	2002-02-24	Gordon M. Spence	0FACB484677B45B9	3252101	Windows,Prime95,v21,NT service,(aka WX5)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-05-01	ATH	55E425C32F161C5F	1	117153	5	3
Verified	PRP without proof (not generated)	2020-05-04	arnaud	55E425C32F161C5F	1	3441077	5	3

History

Date	User	Type	Result
2025-10-04	Sid & Andy	NF-PM1	B1=2700000, B2=4692986760
2020-05-04	arnaud	C-PRP	M7012507/485936040797094641233 : 55E425C32F161C5F
2020-05-01	ATH	C-PRP	M7012507/485936040797094641233 : 55E425C32F161C5F
2020-05-01	TJAOI	F	Factor: 485936040797094641233 / TF: 68-69
2018-07-19	ramgeis	NF	no factor TF: 67-68
2016-04-26	america64	NF	no factor TF: 66-67
2015-07-09	Numberwang	NF	no factor TF: 65-66
2015-07-03	Squeeky_Squirrel	NF-PM1	B1=185000, B2=4255000, E=6
2014-02-13	-anonymous-	NF	no factor TF: 64-65
2014-02-06	Nesowa	NF	no factor TF: 63-64
2011-12-17	bcp19	NF-PM1	B1=85000, B2=1530000, E=6
2002-02-24	Gordon Spence	C-LL	0FACB484677B45B9
2001-10-13	-anonymous-	NF	no factor TF: 1-63
2001-10-13	-anonymous-	NF-PM1	B1=35000, B2=341250
2001-10-06	-anonymous-	NF	no factor TF: 1-63
1999-04-02	-anonymous-	C-LL	0FACB484677B45B9
1999-02-21	-anonymous-	NF	no factor TF: 1-62
1998-02-12	-anonymous-	NF	no factor TF: 1-61