3 998 551 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
39023802495937294880294282719	29	95.0	2022-04-13 08:56:48

ECM

Digits	B1	Curves
25	50000	12 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Calkins	D1CFF6C3E44B36CC	0
Verified (Factored)	1999-09-22	Louis Towles	D1CFF6C3E44B36CC	615375

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-04-19	XZT	2D8D0536E9154FC3	1	3856886	5	3

P-1 factors

Date	Factor	B1	B2
2022-04-13	39023802495937294880294282719	5000000	2005315410

History

Date	User	Type	Result
2022-09-13	Joss	NF-PM1	B1=1000000, B2=113097600
2022-08-26	Joss	NF-PM1	B1=1000000
2022-05-12	Joss	NF-PM1	B1=500000, B2=113097600
2022-04-20	Quarkless	CERT	PRP Certification Proof certified good
2022-04-19	XZT	C-PRP	M3998551/39023802495937294880294282719 : 2D8D0536E9154FC3 PRP proof power = 7 PRP: Verified Proof certified good
2022-04-13	King	F-PM1	Factor: 39023802495937294880294282719 / (P-1, B1=5000000, B2=2005315410)
2021-06-02	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-05-21	axn	NF	no factor from 2^69 to 2^70
2020-03-13	TJAOI	NF	no factor from 2^68 to 2^69
2018-07-23	TJAOI	NF	no factor from 2^67 to 2^68
2016-12-18	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-10-21	Squeeky_Squirrel	NF-PM1	B1=245000, B2=6860000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-01-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-08-17	Squeeky_Squirrel	NF-PM1	B1=190000, B2=4845000, E=6
2014-11-25	Joss	NF-PM1	B1=86052
2013-10-08	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-17	Jayder	NF	no factor from 2^63 to 2^64
2012-02-29	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-09-19	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1190000, E=6
2010-11-03	Sid & Andy	NF	no factor from 2^61 to 2^62
2009-07-27	Carsten Kossendey	NF-PM1	B1=20000, B2=290000

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