5 143 349 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
5020981846305143472529	22	72.1	2019-05-01 18:15:53

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-06-14	Jon Epperson	1590909F75D3486E	0
Verified (Factored)	2000-05-31	Phil Brett	1590909F75D3486E	1143088

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-05-02	artorollo	F25971FDB138745E	1	2479684	5	3
Verified	2019-05-02	ATH	F25971FDB138745E	1	1068727	5	3

P-1 factors

Date	Factor	B1	B2
2019-05-01	5020981846305143472529	305000	9683750

History

Date	User	Type	Result
2019-05-02	ATH	C-PRP	M5143349/5020981846305143472529 : F25971FDB138745E PRP: Verified PRP without proof (not generated)
2019-05-02	artorollo	C-PRP	M5143349/5020981846305143472529 : F25971FDB138745E PRP: Verified PRP without proof (not generated)
2019-05-01	USAFSS	F-PM1	Factor: 5020981846305143472529 / (P-1, B1=305000, B2=9683750, E=12)
2018-06-20	ramgeis	NF	no factor from 2^67 to 2^68
2016-05-28	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-08-07	snme2pm1	NF	no factor from 2^65 to 2^66
2014-12-16	VictordeHollander	NF	no factor from 2^64 to 2^65
2014-12-16	VictordeHollander	NF	no factor from 2^63 to 2^64
2009-11-06	S485122	NF	no factor from 2^62 to 2^63
2009-09-22	USAFSS	NF-PM1	B1=60000, B2=1065000, E=6
2008-10-10	Sturle Sunde	NF	no factor from 2^61 to 2^62