7 050 521 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
486461836641479179799	21	68.7	2020-05-01 08:51:02

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	1999-08-07	Marc Getty / Phil Fizur	FF06D22E198A32DD	1201240	Windows,Prime95,v18,(aka WU1)
Factored	2002-02-24	Graham Cousens	FF06D22E198A32DD	553798	Windows,Prime95,v21,(aka WX1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-05-02	riccardo uberti	91F84A9D4F73F1D1	1	2890761	5	3
Verified	PRP without proof (not generated)	2020-05-05	arnaud	91F84A9D4F73F1D1	1	4858960	5	3

History

Date	User	Type	Result
2020-05-05	arnaud	C-PRP	M7050521/486461836641479179799 : 91F84A9D4F73F1D1
2020-05-02	riccardo uberti	C-PRP	M7050521/486461836641479179799 : 91F84A9D4F73F1D1
2020-05-01	TJAOI	F	Factor: 486461836641479179799 / TF: 68-69
2018-07-22	ramgeis	NF	no factor TF: 67-68
2018-04-17	Squeeky_Squirrel	NF-PM1	B1=410000, B2=12505000, E=12
2016-07-31	kkmrkkblmbrbk	NF	no factor TF: 66-67
2015-06-16	VictordeHollander	NF	no factor TF: 65-66
2014-02-11	lycorn	NF	no factor TF: 64-65
2014-02-06	Nesowa	NF	no factor TF: 63-64
2011-12-04	bcp19	NF-PM1	B1=85000, B2=1530000, E=6
2002-02-24	-anonymous-	C-LL	FF06D22E198A32DD
2002-01-28	-anonymous-	NF-PM1	B1=35000, B2=297500
2001-10-13	-anonymous-	NF	no factor TF: 1-63
1999-08-07	-anonymous-	C-LL	FF06D22E198A32DD
1999-04-02	-anonymous-	C-LL	B299C8785984FB__
1998-07-11	Andrew L. Neporada	NF	no factor TF: 1-62
1998-05-23	-anonymous-	NF	no factor TF: 1-61