2 495 501 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
50730560908651688809617559	26	85.4	2014-12-08 01:09:55

ECM

Digits	B1	Curves
25	50000	36 / 280

Estimated T-Level: 20.6 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Earl Malmrose	DAFC1CDBE2D0AF22	0
Verified (Factored)		Martin Buck	DAFC1CDBE2D0AF22	0
Verified (Factored)	1999-08-16	Morten Ringvold	DAFC1CDBE2D0AF22	786391

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-14	kkmrkkblmbrbk	7D928F79FFC017D1	1	69731	5	3
Verified	2017-11-07	Oliver Kruse	7D928F79FFC017D1	1	136021	5	3

P-1 factors

Date	Factor	B1	B2
2014-12-08	50730560908651688809617559	2382500	85770100

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-07	Oliver Kruse	C-PRP	M2495501/50730560908651688809617559 : 7D928F79FFC017D1 PRP: Verified PRP without proof (not generated)
2017-10-14	kkmrkkblmbrbk	C-PRP	M2495501/50730560908651688809617559 : 7D928F79FFC017D1 PRP: Verified PRP without proof (not generated)
2014-12-08	mikr	F-PM1	Factor: 50730560908651688809617559 / (P-1, B1=2382500, B2=85770100, E=12)
2014-09-10	Joss	NF-PM1	B1=120720
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-11	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-25	Oscar Östlin	NF-PM1	B1=95000, B2=1971250, E=6
2010-12-22	Joss	NF-PM1	B1=20000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61