3 998 821 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
3838909332127035671583847	25	81.7	2022-05-11 13:49:15

ECM

Digits	B1	Curves
25	50000	14 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-02-08	Scott Galiardo	2BC16162FA30FF61	0
Verified (Factored)	1999-12-15	David M. Moore	2BC16162FA30FF61	19878

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-05-12	aperson1	7A2C4AE20FC81C8E	1	3935280	5	3

History

Date	User	Type	Result
2022-07-20	Joss	NF-PM1	B1=4000000, B2=4016348700
2022-05-12	ANONYMOUS	CERT	PRP Certification Proof certified good
2022-05-12	aperson1	C-PRP	M3998821/3838909332127035671583847 : 7A2C4AE20FC81C8E PRP proof power = 7 PRP: Verified Proof certified good
2022-05-11	Sergey Nosov	F-ECM	Factor: 3838909332127035671583847 / (ECM curve 2, B1=50000, B2=5000000)
2022-02-09	Joss	NF-PM1	B1=4000000, B2=116886000
2022-01-26	Joss	NF-PM1	B1=3998821, B2=10019717400
2022-01-26	Joss	NF-PM1	B1=3998821, B2=4013278500
2021-06-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-05-22	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
2015-08-16	Squeeky_Squirrel	NF-PM1	B1=190000, B2=4845000, E=6
2014-11-25	Joss	NF-PM1	B1=86051
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
2010-11-04	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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