3 910 427 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
141839366534423386943	21	66.9	2016-12-03 10:46:47

ECM

Digits	B1	Curves
25	50000	15 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-01-26	Jim Regan	B58FBB24B6DB0206	0
Verified (Factored)	1999-11-24	Jonathan Brown	B58FBB24B6DB0206	2357920

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-12	kkmrkkblmbrbk	E558B89718192C39	1	211017	5	3
Verified	2017-12-28	Squeeky_Squirrel	E558B89718192C39	1	1221771	5	3

History

Date	User	Type	Result
2022-05-25	Joss	NF-PM1	B1=100000, B2=130364850
2022-03-22	Joss	NF-PM1	B1=100000
2022-03-04	Joss	NF-PM1	B1=90000
2017-12-28	Squeeky_Squirrel	C-PRP	M3910427/141839366534423386943 : E558B89718192C39 PRP: Verified PRP without proof (not generated)
2017-11-12	kkmrkkblmbrbk	C-PRP	M3910427/141839366534423386943 : E558B89718192C39 PRP: Verified PRP without proof (not generated)
2016-12-03	Gordon Spence	F	Factor: 141839366534423386943 / TF: 66-67
2016-03-01	Joss	NF-PM1	B1=228096, B2=2280960, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-11	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-14	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-14	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-03	Joss	NF-PM1	B1=86414
2012-02-10	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-06	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1172500, E=6
2011-02-13	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-09	Carsten Kossendey	NF-PM1	B1=20000, B2=285000
2008-12-30	Architects Cubed	NF	no factor from 2^60 to 2^61