2 236 261 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
97842306068703860875831	23	76.4	2020-07-21 17:19:36

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)		Ed Knapton	C47065ADB729ACC8	0
Verified (Factored)	1999-02-14	Philip Cook	C47065ADB729ACC8	161709
Verified (Factored)	2018-04-21	kkmrkkblmbrbk	C47065ADB729ACC8	2033783

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-21	ATH	3D2B394C32B99714	1	300211	5	3
Verified	2020-07-22	marssystems	3D2B394C32B99714	1	1194202	5	3

History

Date	User	Type	Result
2020-07-22	marssystems	C-PRP	M2236261/97842306068703860875831 : 3D2B394C32B99714 PRP: Verified PRP without proof (not generated)
2020-07-21	ATH	C-PRP	M2236261/97842306068703860875831 : 3D2B394C32B99714 PRP: Verified PRP without proof (not generated)
2020-07-21	GAN	F-ECM	Factor: 97842306068703860875831 / (ECM curve 1, B1=50000, B2=5000000, Sigma=893877304982715)
2019-04-08	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-21	kkmrkkblmbrbk	C-LL	C47065ADB729ACC8
2016-12-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-01-09	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-12-01	Alexander Dubrovin	NF-PM1	B1=1000000, B2=6000000, E=6
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-30	Joss	NF-PM1	B1=142404
2014-06-01	Joss	NF-PM1	B1=113702
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-21	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-14	Oscar Östlin	NF-PM1	B1=85000, B2=1615000, E=6
2010-11-07	Oscar Östlin	NF-PM1	B1=75011
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61