2 378 653 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
33131794437531629292881	23	74.8	2017-03-18 06:12:43

ECM

Digits	B1	Curves
25	50000	76 / 280

Estimated T-Level: 21.4 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Peter Marksteiner	DB9C0D71E6A3A74D	0
Verified (Factored)	1999-03-15	chris clark	DB9C0D71E6A3A74D	851100

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	Oliver Kruse	FCC48DDA10CAF445	1	486324	5	3
Verified	2017-11-25	kkmrkkblmbrbk	FCC48DDA10CAF445	1	1500597	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-25	kkmrkkblmbrbk	C-PRP	M2378653/33131794437531629292881 : FCC48DDA10CAF445 PRP: Verified PRP without proof (not generated)
2017-10-12	Oliver Kruse	C-PRP	M2378653/33131794437531629292881 : FCC48DDA10CAF445 PRP: Verified PRP without proof (not generated)
2017-03-18	bam	F-ECM	Factor: 33131794437531629292881 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-01	ramgeis	NF	no factor from 2^65 to 2^66
2015-10-12	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2015-03-09	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-09	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-10	Joss	NF-PM1	B1=126983
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-31	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-28	markr	NF-PM1	B1=100000, B2=2050000, E=6
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-07	Joss	NF-PM1	B1=15000
2009-01-15	Sturle Sunde	NF	no factor from 2^60 to 2^61