2 254 247 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
47209812432179455807513	23	75.3	2022-08-07 10:44:19
667112694149792536469377	24	79.1	2011-10-26 16:15:07

ECM

Digits	B1	Curves
25	50000	88 / 280

Estimated T-Level: 21.6 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Nayan Hajratwala	BF6E52BA29EE639E	0
Verified (Factored)	1999-02-21	William Gnadt	BF6E52BA29EE639E	1511483

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-10	Oliver Kruse	5F9C9FF0AB72B769	1	0	1	3
Verified (Factored)	2017-11-21	kkmrkkblmbrbk	5F9C9FF0AB72B769	1	760002	1	3
Verified	2022-08-10	LordJulius	989218C8A914900B	2	1956078	5	3
Verified	2022-08-11	_p95holder_	989218C8A914900B	2	1193631	5	3

History

Date	User	Type	Result
2022-08-11	_p95holder_	C-PRP	M2254247/667112694149792536469377/47209812432179455807513 : 989218C8A914900B PRP: Verified PRP without proof (not generated)
2022-08-10	iwes	CERT	PRP Certification Proof certified good
2022-08-10	LordJulius	C-PRP	M2254247/47209812432179455807513/667112694149792536469377 : 989218C8A914900B PRP proof power = 7 PRP: Verified Proof certified good
2022-08-07	_p95holder_	F-ECM	Factor: 47209812432179455807513 / (ECM curve 1, B1=50000, B2=5000000)
2017-11-21	kkmrkkblmbrbk	C-PRP	M2254247/667112694149792536469377 : 5F9C9FF0AB72B769 PRP: Verified PRP without proof (not generated)
2017-10-10	Oliver Kruse	C-PRP	M2254247/667112694149792536469377 : 5F9C9FF0AB72B769 PRP: Verified PRP without proof (not generated)
2016-04-09	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-10-26	csaba	F-ECM	Factor: 667112694149792536469377
2011-01-16	Oscar Östlin	NF-PM1	B1=85000, B2=1636250, E=6
2010-11-24	Oscar Östlin	NF-PM1	B1=75011
2010-11-14	Joss	NF-PM1	B1=20000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61