2 448 379 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
3406284320132196128993	22	71.5	2016-04-24 06:34:15

ECM

Digits	B1	Curves
25	50000	160 / 280

Estimated T-Level: 22.9 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Michael E. Carboy	4074C711E46B31DD	0
Verified (Factored)	1999-04-13	Kent Lee	4074C711E46B31DD	1456215

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-13	Oliver Kruse	09A369181D246E02	1	279262	5	3
Verified	2017-11-28	kkmrkkblmbrbk	09A369181D246E02	1	623469	5	3

History

Date	User	Type	Result
2019-02-05	Joss	NF-PM1	B1=1000000
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-28	kkmrkkblmbrbk	C-PRP	M2448379/3406284320132196128993 : 09A369181D246E02 PRP: Verified PRP without proof (not generated)
2017-10-13	Oliver Kruse	C-PRP	M2448379/3406284320132196128993 : 09A369181D246E02 PRP: Verified PRP without proof (not generated)
2016-04-24	lettp	F-ECM	Factor: 3406284320132196128993 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-01-29	mikr	NF-PM1	B1=1172000, B2=48000000, E=12
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-06	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-19	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2011-01-19	Joss	NF-PM1	B1=50000
2010-11-19	Joss	NF-PM1	B1=20000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61