4 007 687 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
17691069533643134032567	23	73.9	2017-10-23 09:46:05
194210440190453949047080151	27	87.3	2017-10-23 09:46:05

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-04-27	Gordon Cross	A74433B592699A1F	0
Verified (Factored)	1999-10-07	Jason Levine	A74433B592699A1F	2376526

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-23	Yaroslav Berezhko	2EB3CDB5D0E499AB	2	2699711	5	3
Verified	2017-10-23	Yaroslav Berezhko	2EB3CDB5D0E499AB	2	3485902	5	3
Verified	2018-03-16	kkmrkkblmbrbk	2EB3CDB5D0E499AB	2	1945617	5	3

P-1 factors

Date	Factor	B1	B2
2017-10-23	3435790401568761918992632857714098087449493277617	4600000	0

History

Date	User	Type	Result
2022-09-05	USAFSS	NF-PM1	B1=300000, B2=168114660
2018-03-16	kkmrkkblmbrbk	C-PRP	M4007687/17691069533643134032567/194210440190453949047080151 : 2EB3CDB5D0E499AB PRP: Verified PRP without proof (not generated)
2017-10-23	Yaroslav Berezhko	C-PRP	M4007687/17691069533643134032567/194210440190453949047080151 : 2EB3CDB5D0E499AB PRP: Verified PRP without proof (not generated)
2017-10-23	Yaroslav Berezhko	C-PRP	M4007687/17691069533643134032567/194210440190453949047080151 : 2EB3CDB5D0E499AB PRP: Verified PRP without proof (not generated)
2017-10-23	mikr	F-PM1	Factor: 3435790401568761918992632857714098087449493277617 / (P-1, B1=4600000)
2016-08-29	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-05-18	snme2pm1	NF	no factor from 2^65 to 2^66
2014-12-31	Nesowa	NF-PM1	B1=225000, B2=4556250, E=6
2013-10-07	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-23	Jayder	NF	no factor from 2^63 to 2^64
2013-02-09	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1575000, E=6
2010-01-02	Squeeky_Squirrel	NF-PM1	B1=40000, B2=600000, E=4
2009-11-06	GrunwalderGIMP	NF	no factor from 2^1 to 2^63