2 157 173 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1957023033321973680605063	25	80.7	2020-03-18 13:00:36

ECM

Digits	B1	Curves
25	50000	64 / 280

Estimated T-Level: 21.1 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Lloyd	6EF72DCCF90CE634	0
Verified (Factored)	1999-05-09	Luigi Morelli	6EF72DCCF90CE634	1711146
Verified (Factored)	2018-04-10	kkmrkkblmbrbk	6EF72DCCF90CE634	206869

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-18	mrh	CB8B68998FEBD839	1	1927467	5	3
Verified	2020-03-19	marssystems	CB8B68998FEBD839	1	1985206	5	3

History

Date	User	Type	Result
2020-03-19	marssystems	C-PRP	M2157173/1957023033321973680605063 : CB8B68998FEBD839 PRP: Verified PRP without proof (not generated)
2020-03-18	mrh	C-PRP	M2157173/1957023033321973680605063 : CB8B68998FEBD839 PRP: Verified PRP without proof (not generated)
2020-03-18	mnd9	F-ECM	Factor: 1957023033321973680605063 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7050223535478089)
2019-09-27	mikr	NF-PM1	B1=5000000, B2=200000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-10	kkmrkkblmbrbk	C-LL	6EF72DCCF90CE634
2017-09-19	Joss	NF-PM1	B1=576000, B2=5760000, E=6
2017-09-13	Joss	NF-PM1	B1=480000, B2=4800000, E=6
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-16	Joss	NF-PM1	B1=240000, B2=8842648, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-03	Joss	NF-PM1	B1=149754
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-23	markr	NF-PM1	B1=120000, B2=2340000, E=6
2010-11-10	Joss	NF-PM1	B1=60000
2010-11-07	Joss	NF-PM1	B1=45000
2010-11-07	Joss	NF-PM1	B1=30000
2010-11-04	Joss	NF-PM1	B1=15000
2009-01-07	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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