2 873 029 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
6072240446936973815271511	25	82.3	2023-05-24 18:28:51

ECM

Digits	B1	Curves
25	50000	141 / 280

Estimated T-Level: 22.5 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-30	John R Pierce	1A81EBC359500806	0
Verified (Factored)	1999-05-30	Karl-Friedrich Giebel	1A81EBC359500806	2849067
Verified (Factored)	2018-09-22	kkmrkkblmbrbk	1A81EBC359500806	1897893

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-05-25	Naegi Makoto	9F1D1473E5F231A5	1	613469	5	3

P-1 factors

Date	Factor	B1	B2
2023-05-24	6072240446936973815271511	1000000	2085523440

History

Date	User	Type	Result
2023-05-25	curtisc	CERT	PRP Certification Proof certified good
2023-05-25	Naegi Makoto	C-PRP	M2873029/6072240446936973815271511 : 9F1D1473E5F231A5 PRP proof power = 7 PRP: Verified Proof certified good
2023-05-24	Joss	F-PM1	Factor: 6072240446936973815271511 / (P-1, B1=1000000, B2=2085523440)
2021-05-27	TJAOI	NF	no factor from 2^68 to 2^69
2020-02-29	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-21	masser	NF-PM1	B1=2880000, B2=28800000, E=12
2019-01-09	chuenkit	NF	no factor from 2^67 to 2^68
2018-09-22	kkmrkkblmbrbk	C-LL	1A81EBC359500806
2017-12-30	Joss	NF-PM1	B1=634788, B2=6347880, E=6
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-26	Joss	NF-PM1	B1=317394, B2=3173940, E=6
2017-01-10	Joss	NF-PM1	B1=220413
2016-12-18	Joss	NF-PM1	B1=183678
2016-09-21	Joss	NF-PM1	B1=153065, B2=3061300
2016-09-14	Joss	NF-PM1	B1=153065, B2=2783000, 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
2012-01-28	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-02-06	markr	NF-PM1	B1=115000, B2=2530000, E=6
2011-01-22	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-23	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=161250
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61

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