2 291 347 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
48128148673343013489981703	26	85.3	2020-05-26 22:17:31

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)		Simon Burge	489FA8CB6BCCA697	0
Verified (Factored)	1999-03-26	Kent Lee	489FA8CB6BCCA697	1049054
Verified (Factored)	2018-04-29	kkmrkkblmbrbk	489FA8CB6BCCA697	1731875

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-05-27	M Miller	7D71521E9595C17B	1	1492534	5	3
Verified	2020-06-01	Chang Chia-Tche	7D71521E9595C17B	1	2076248	5	3

History

Date	User	Type	Result
2020-06-01	Chang Chia-Tche	C-PRP	M2291347/48128148673343013489981703 : 7D71521E9595C17B PRP: Verified PRP without proof (not generated)
2020-05-27	M Miller	C-PRP	M2291347/48128148673343013489981703 : 7D71521E9595C17B PRP: Verified PRP without proof (not generated)
2020-05-26	Chang Chia-Tche	F-ECM	Factor: 48128148673343013489981703 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7163030339983122)
2019-07-22	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-06-03	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-29	kkmrkkblmbrbk	C-LL	489FA8CB6BCCA697
2017-05-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-01-01	Joss	NF-PM1	B1=359752, B2=3597520, E=6
2015-11-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-12	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-12	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-03	Joss	NF-PM1	B1=141024
2014-06-11	Joss	NF-PM1	B1=113012
2013-08-20	David Campeau	NF	no factor from 2^62 to 2^63
2012-05-12	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-16	Oscar Östlin	NF-PM1	B1=85000, B2=1742500, E=6
2010-11-29	Oscar Östlin	NF-PM1	B1=75011
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-07	Joss	NF-PM1	B1=15000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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