2 253 037 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
404744064963341851721	21	68.5	2020-06-01 04:10:54

ECM

Digits	B1	Curves
25	50000	72 / 280

Estimated T-Level: 21.3 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-11-11	Dongsheng Liu	C2D72B07D2C36C5B	0
Verified (Factored)	1999-03-01	Ethan O'Connor	C2D72B07D2C36C5B	1978334
Verified (Factored)	2018-04-23	kkmrkkblmbrbk	C2D72B07D2C36C5B	1369287

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-06-03	Oliver Kruse	E62864960B29B5DE	1	318442	5	3
Verified	2020-06-03	ATH	E62864960B29B5DE	1	4787	5	3

History

Date	User	Type	Result
2023-05-13	This -Anonymous-	NF-PM1	B1=800000, B2=40000000, E=12
2020-06-03	ATH	C-PRP	M2253037/404744064963341851721 : E62864960B29B5DE PRP: Verified PRP without proof (not generated)
2020-06-03	Oliver Kruse	C-PRP	M2253037/404744064963341851721 : E62864960B29B5DE PRP: Verified PRP without proof (not generated)
2020-06-01	GAN	F-ECM	Factor: 404744064963341851721 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4038883036044362)
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-23	kkmrkkblmbrbk	C-LL	C2D72B07D2C36C5B
2017-01-05	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-01-19	Joss	NF-PM1	B1=589050, B2=5890500, E=6
2015-10-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-03	Joss	NF-PM1	B1=141976
2014-06-01	Joss	NF-PM1	B1=113488
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-04	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-14	Oscar Östlin	NF-PM1	B1=85000, B2=1636250, E=6
2010-11-23	Oscar Östlin	NF-PM1	B1=75011
2010-11-14	Joss	NF-PM1	B1=20000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61

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