2 866 583 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
43518308781030623386153	23	75.2	2020-08-02 20:08:38

ECM

Digits	B1	Curves
25	50000	20 / 280

Estimated T-Level: 20.4 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Dylan Vance	B79F38F3FC0702C3	0
Verified (Factored)	1999-05-09	Yann Forget	B79F38F3FC0702C3	367984
Verified (Factored)	2018-09-20	kkmrkkblmbrbk	B79F38F3FC0702C3	247424

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-02	ATH	E4DA13D3125E475C	1	866057	5	3

History

Date	User	Type	Result
2020-08-02	George Woltman	CERT	PRP Certification Proof certified good
2020-08-02	ATH	C-PRP	M2866583/43518308781030623386153 : E4DA13D3125E475C PRP proof power = 7 PRP: Verified Proof certified good
2020-08-02	GAN	F-ECM	Factor: 43518308781030623386153 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7613918854588798)
2020-03-13	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-26	masser	NF-PM1	B1=2870000, B2=28700000, E=12
2019-01-08	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-20	kkmrkkblmbrbk	C-LL	B79F38F3FC0702C3
2017-12-21	Joss	NF-PM1	B1=634790, B2=6347900, E=6
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-26	Joss	NF-PM1	B1=317395, B2=3173950, E=6
2017-01-10	Joss	NF-PM1	B1=264496
2017-01-10	Joss	NF-PM1	B1=220413
2016-12-18	Joss	NF-PM1	B1=183678
2016-08-28	Joss	NF-PM1	B1=153065, B2=4830000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-18	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
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-26	markr	NF	no factor from 2^61 to 2^62
2011-02-10	markr	NF-PM1	B1=115000, B2=2415000, E=6
2011-01-21	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=157500
2009-02-12	Sturle Sunde	NF	no factor from 2^60 to 2^61

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