2 664 643 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
4448748561021271411109279	25	81.9	2019-11-22 05:04:25

ECM

Digits	B1	Curves
25	50000	136 / 280

Estimated T-Level: 22.4 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Benoit BRUET	373C8564B4AD8358	0
Verified (Factored)	1999-04-13	Ethan Hansen	373C8564B4AD8358	22669
Verified (Factored)	2018-07-23	kkmrkkblmbrbk	373C8564B4AD8358	2296215

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-11-23	mnd9	FF3B29CDE0CBB354	1	870119	5	3
Verified	2019-11-23	ATH	FF3B29CDE0CBB354	1	2433427	5	3

P-1 factors

Date	Factor	B1	B2
2019-11-22	4448748561021271411109279	2000000	50000000

History

Date	User	Type	Result
2019-11-23	ATH	C-PRP	M2664643/4448748561021271411109279 : FF3B29CDE0CBB354 PRP: Verified PRP without proof (not generated)
2019-11-23	mnd9	C-PRP	M2664643/4448748561021271411109279 : FF3B29CDE0CBB354 PRP: Verified PRP without proof (not generated)
2019-11-22	masser	F-PM1	Factor: 4448748561021271411109279 / (P-1, B1=2000000, B2=50000000, E=12)
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-09-07	Joss	NF-PM1	B1=630350, B2=2521400
2018-09-04	Joss	NF-PM1	B1=630350, B2=1891050
2018-09-03	Joss	NF-PM1	B1=630350, B2=1260700
2018-08-30	Joss	NF-PM1	B1=630350
2018-08-29	Joss	NF-PM1	B1=626652
2018-07-23	kkmrkkblmbrbk	C-LL	373C8564B4AD8358
2017-09-08	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-07	Joss	NF-PM1	B1=315175, B2=3151750, E=6
2017-01-10	Joss	NF-PM1	B1=218872
2016-12-18	Joss	NF-PM1	B1=182394
2016-06-08	Joss	NF-PM1	B1=151995, 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=129087
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-21	markr	NF	no factor from 2^61 to 2^62
2011-02-03	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
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61

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