2 795 209 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
471853815307554651312119047	27	88.6	2019-12-17 11:28:52

ECM

Digits	B1	Curves
25	50000	84 / 280

Estimated T-Level: 21.5 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Scott Morris	790ED2E4BB25121F	0
Verified (Factored)	1999-05-02	Matti Kinnunen	790ED2E4BB25121F	2642044
Verified (Factored)	2018-08-30	kkmrkkblmbrbk	790ED2E4BB25121F	1371102

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-12-18	James Heinrich	BBC067484639CAE6	1	438461	5	3
Verified	2019-12-19	marssystems	BBC067484639CAE6	1	571297	5	3

P-1 factors

Date	Factor	B1	B2
2019-12-17	471853815307554651312119047	3000000	90000000

History

Date	User	Type	Result
2019-12-19	marssystems	C-PRP	M2795209/471853815307554651312119047 : BBC067484639CAE6 PRP: Verified PRP without proof (not generated)
2019-12-18	James Heinrich	C-PRP	M2795209/471853815307554651312119047 : BBC067484639CAE6 PRP: Verified PRP without proof (not generated)
2019-12-17	BigBrother	F-PM1	Factor: 471853815307554651312119047 / (P-1, B1=3000000, B2=90000000, E=12)
2019-02-27	chuenkit	NF	no factor from 2^67 to 2^68
2018-08-30	kkmrkkblmbrbk	C-LL	790ED2E4BB25121F
2017-10-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-30	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-07	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-09	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-06	Joss	NF-PM1	B1=122962
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-01	markr	NF	no factor from 2^61 to 2^62
2010-11-22	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-14	Joss	NF-PM1	B1=15000
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61