2 223 731 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
384884746913182480683857	24	78.3	2018-01-06 18:59:24

ECM

Digits	B1	Curves
25	50000	89 / 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)		Bob Moulton	B15AE32E39E67B6C	0
Verified (Factored)	1999-03-01	Charles Bell	B15AE32E39E67B6C	373804

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-01-06	ATH	BAEFA5E19E898AC7	1	805328	5	3
Verified	2018-01-07	Oliver Kruse	BAEFA5E19E898AC7	1	283222	5	3

History

Date	User	Type	Result
2018-01-07	Oliver Kruse	C-PRP	M2223731/384884746913182480683857 : BAEFA5E19E898AC7 PRP: Verified PRP without proof (not generated)
2018-01-06	ATH	C-PRP	M2223731/384884746913182480683857 : BAEFA5E19E898AC7 PRP: Verified PRP without proof (not generated)
2018-01-06	bam	F-ECM	Factor: 384884746913182480683857 / (ECM curve 3, B1=50000, B2=5000000)
2016-12-23	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
2015-12-22	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=5000000, E=6
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-05-02	Squeeky_Squirrel	NF-PM1	B1=160000, B2=4600000, E=6
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=142726
2014-05-26	Joss	NF-PM1	B1=113863
2013-08-20	David Campeau	NF	no factor from 2^62 to 2^63
2012-04-19	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-12	Oscar Östlin	NF-PM1	B1=85000, B2=1593750, E=6
2010-10-21	Oscar Östlin	NF-PM1	B1=75011
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61