2 664 083 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
9889843722182907159714608726586281	34	112.9	2021-08-28 09:27:24

ECM

Digits	B1	Curves
25	50000	119 / 280

Estimated T-Level: 22.1 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ivor Horton	58CF28B252E50CEA	0
Verified (Factored)	1999-09-30	Shayne Hodge	58CF28B252E50CEA	1829104
Verified (Factored)	2018-07-22	kkmrkkblmbrbk	58CF28B252E50CEA	1471770

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-08-28	SRJ2877	1E9606CC02C9BE17	1	195955	5	3

History

Date	User	Type	Result
2021-08-28	Martin Tindfors	CERT	PRP Certification Proof certified good
2021-08-28	SRJ2877	C-PRP	M2664083/9889843722182907159714608726586281 : 1E9606CC02C9BE17 PRP proof power = 7 PRP: Verified Proof certified good
2021-08-28	MarkS	F-ECM	Factor: 9889843722182907159714608726586281 / (ECM curve 3, B1=50000, B2=5000000, Sigma=7058630783404862)
2021-06-21	TJAOI	NF	no factor from 2^68 to 2^69
2019-11-22	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-22	kkmrkkblmbrbk	C-LL	58CF28B252E50CEA
2018-07-08	Joss	NF-PM1	B1=670000, B2=6700000, E=6
2017-09-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-04-12	Joss	NF-PM1	B1=335000, B2=3350000, E=6
2016-12-20	Joss	NF-PM1	B1=201000
2016-06-07	Joss	NF-PM1	B1=167500, B2=4567500, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-06	Joss	NF-PM1	B1=129092
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-22	markr	NF	no factor from 2^61 to 2^62
2011-02-04	markr	NF-PM1	B1=105000, B2=2283750, E=6
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61

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