2 361 253 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
366439273181923285371553	24	78.3	2020-07-05 15:10:47

ECM

Digits	B1	Curves
25	50000	66 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Will Dahlgren	89BBB71B1042F861	0
Verified (Factored)	1999-03-26	Charles Dorian	89BBB71B1042F861	317319
Verified (Factored)	2018-05-11	kkmrkkblmbrbk	89BBB71B1042F861	1531101

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-07-05	riccardo uberti	CBF1F9F15F945E24	1	494511	5	3
Verified	2020-07-06	marssystems	CBF1F9F15F945E24	1	134535	5	3

History

Date	User	Type	Result
2020-07-06	marssystems	C-PRP	M2361253/366439273181923285371553 : CBF1F9F15F945E24 PRP: Verified PRP without proof (not generated)
2020-07-05	riccardo uberti	C-PRP	M2361253/366439273181923285371553 : CBF1F9F15F945E24 PRP: Verified PRP without proof (not generated)
2020-07-05	GAN	F-ECM	Factor: 366439273181923285371553 / (ECM curve 3, B1=50000, B2=5000000, Sigma=655926346167483)
2019-04-22	TJAOI	NF	no factor from 2^67 to 2^68
2018-05-11	kkmrkkblmbrbk	C-LL	89BBB71B1042F861
2017-06-13	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-10-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-08-23	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-22	Joss	NF-PM1	B1=144364
2014-08-07	Joss	NF-PM1	B1=117182
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-30	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-22	Oscar Östlin	NF-PM1	B1=90000, B2=1822500, E=6
2010-12-23	Oscar Östlin	NF-PM1	B1=75011
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61