7 000 391 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 2⁷¹

TF target 2⁶⁷

Factored

Factor	Digits	Bits	Date
13170470256127285429543	23	73.5	2020-05-14 21:54:44

P-1 factors

Date	Factors	B1	B2
2020-05-14	13170470256127285429543	2800000	140000000

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	2000-02-09	Michael Oates	F48B276C81924B61	595012	Windows,Prime95,v19,(aka WV1)
Factored	2002-07-06	Alberto Maurer	F48B276C81924B61	3116418	Windows,Prime95,v21,(aka WX1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-05-15	Klaus Nordmann	92F6E384903CCC95	1	174498	5	3
Verified	PRP without proof (not generated)	2020-05-17	Luigi Morelli	92F6E384903CCC95	1	3249588	5	3

History

Date	User	Type	Result
2020-05-17	Luigi Morelli	C-PRP	M7000391/13170470256127285429543 : 92F6E384903CCC95
2020-05-15	Klaus Nordmann	C-PRP	M7000391/13170470256127285429543 : 92F6E384903CCC95
2020-05-14	timbit	F-PM1	Factor: 13170470256127285429543 / B1=2800000, B2=140000000
2016-04-28	ramgeis	NF	no factor TF: 70-71
2016-04-28	ramgeis	NF	no factor TF: 69-70
2016-04-28	ramgeis	NF	no factor TF: 68-69
2016-04-25	america64	NF	no factor TF: 67-68
2016-04-25	america64	NF	no factor TF: 66-67
2015-06-12	VictordeHollander	NF	no factor TF: 65-66
2015-06-08	Squeeky_Squirrel	NF-PM1	B1=180000, B2=4230000, E=6
2013-11-10	David Campeau	NF	no factor TF: 64-65
2011-11-16	bcp19	NF	no factor TF: 63-64
2002-07-06	-anonymous-	C-LL	F48B276C81924B61
2000-02-09	-anonymous-	C-LL	F48B276C81924B61
2000-01-12	-anonymous-	NF	no factor TF: 1-63
1999-04-13	William B. Adams	C-LL	DA3D3CA86A820F__
1999-02-21	William B. Adams	NF	no factor TF: 1-62
1998-02-12	-anonymous-	NF	no factor TF: 1-61