6 187 427 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
4935645895076029183293658987444657871	37	121.9	2019-09-06 16:49:56

ECM

Digits	B1	Curves
25	50000	6 / 280

Estimated T-Level: 20.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-11-21	Glenn S. Maitz	45C6B0703961FA43	0
Verified (Factored)	2001-08-12	Stephen Wood	45C6B0703961FA43	2760451
Verified (Factored)	2015-04-29	MadPoo	45C6B0703961FA43	2943040

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-09-07	mnd9	584BD8F857332DB9	1	2426609	5	3
Verified	2019-09-08	kkmrkkblmbrbk	584BD8F857332DB9	1	5441168	5	3

P-1 factors

Date	Factor	B1	B2
2019-09-06	4935645895076029183293658987444657871	600000	12000000

History

Date	User	Type	Result
2019-09-08	kkmrkkblmbrbk	C-PRP	M6187427/4935645895076029183293658987444657871 : 584BD8F857332DB9 PRP: Verified PRP without proof (not generated)
2019-09-07	mnd9	C-PRP	M6187427/4935645895076029183293658987444657871 : 584BD8F857332DB9 PRP: Verified PRP without proof (not generated)
2019-09-06	takahashi	F-PM1	Factor: 4935645895076029183293658987444657871 / (P-1, B1=600000, B2=12000000, E=12)
2018-05-30	ramgeis	NF	no factor from 2^67 to 2^68
2016-04-13	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-10	Bruno Victal	NF	no factor from 2^65 to 2^66
2015-04-29	MadPoo	C-LL	45C6B0703961FA43
2014-09-18	monst	NF	no factor from 2^64 to 2^65
2014-09-10	Nesowa	NF	no factor from 2^63 to 2^64
2013-03-28	Squeeky_Squirrel	NF-PM1	B1=115000, B2=2271250, E=6