2 213 923 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
667391587216158093790340977871399	33	109.0	2016-03-24 21:39:31

ECM

Digits	B1	Curves
25	50000	90 / 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)		Joseph Charrier	56195907D96C365C	0
Bad	1999-02-14	David Phillips	4A89359D3ADFFF6B	1218478
Verified (Factored)	1999-08-07	S.J. van Diest	56195907D96C365C	1050960

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-09	Oliver Kruse	FCBCF79510B1CA68	1	0	1	3
Verified	2017-11-20	kkmrkkblmbrbk	FCBCF79510B1CA68	1	522987	1	3

History

Date	User	Type	Result
2017-11-20	kkmrkkblmbrbk	C-PRP	M2213923/667391587216158093790340977871399 : FCBCF79510B1CA68 PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2213923/667391587216158093790340977871399 : FCBCF79510B1CA68 PRP: Verified PRP without proof (not generated)
2016-04-23	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-03-24	bam	F-ECM	Factor: 667391587216158093790340977871399 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-11	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-11-14	Alexander Dubrovin	NF-PM1	B1=1500000, B2=10000000, E=12
2015-11-14	Alexander Dubrovin	NF-PM1	B1=1000000, B2=5000000, E=6
2015-10-22	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-26	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=142982
2014-05-26	Joss	NF-PM1	B1=113991
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-18	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-01	Oscar Östlin	NF-PM1	B1=85000, B2=1593750, E=6
2010-10-10	Oscar Östlin	NF-PM1	B1=75011
2009-01-07	Sturle Sunde	NF	no factor from 2^60 to 2^61