7 680 437 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
12055574596843645714198769	26	83.3	2020-06-09 00:34:03

P-1 factors

Date	Factors	B1	B2
2020-06-09	12055574596843645714198769	721165	15144458

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	1999-08-16	Steven Carlson	EA9C45E008194E39	3332868	Windows,Prime95,v18,(aka WU1)
Factored	2002-06-02	Bradley A. Ellison	EA9C45E008194E39	4936004	Windows,Prime95,v21,(aka WX1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-06-09	LaurV	29CD10BD0CA62228	1	2607391	5	3
Verified	PRP without proof (not generated)	2020-06-10	MarkS	29CD10BD0CA62228	1	6232454	5	3

History

Date	User	Type	Result
2020-06-10	MarkS	C-PRP	M7680437/12055574596843645714198769 : 29CD10BD0CA62228
2020-06-09	LaurV	C-PRP	M7680437/12055574596843645714198769 : 29CD10BD0CA62228
2020-06-09	GdS	F-PM1	Factor: 12055574596843645714198769 / B1=721165, B2=15144458
2020-03-13	TJAOI	NF	no factor TF: 68-69
2018-07-31	ramgeis	NF	no factor TF: 67-68
2016-09-19	Gordon Spence	NF	no factor TF: 66-67
2015-06-12	VictordeHollander	NF	no factor TF: 65-66
2013-12-09	David Campeau	NF	no factor TF: 64-65
2013-10-11	Nesowa	NF	no factor TF: 63-64
2012-08-04	Nesowa	NF-PM1	B1=95000, B2=1757500, E=6
2003-12-13	-anonymous-	NF	no factor TF: 1-63
2002-06-02	-anonymous-	C-LL	EA9C45E008194E39
2002-04-20	-anonymous-	NF-PM1	B1=35000, B2=332500
2001-07-29	-anonymous-	NF	no factor TF: 1-63
2001-06-30	-anonymous-	NF	no factor TF: 1-63
1999-08-16	-anonymous-	C-LL	EA9C45E008194E39
1999-03-01	-anonymous-	NF	no factor TF: 1-63
1999-01-29	Nicolas Marmet	NF	no factor TF: 1-62
1998-08-09	-anonymous-	NF	no factor TF: 1-61