2 207 143 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
11590150945291709279023	23	73.3	2017-11-22 04:54:13

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	188 / 640

Estimated T-Level: 26.5 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Didier Couderc	AB7238B82EA622A1	0
Verified (Factored)	1999-02-07	Kent Lee	AB7238B82EA622A1	373809

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-22	kkmrkkblmbrbk	B738F3C4B8C80893	1	113257	5	3
Verified	2017-11-23	Oliver Kruse	B738F3C4B8C80893	1	1752466	5	3

History

Date	User	Type	Result
2017-11-23	Oliver Kruse	C-PRP	M2207143/11590150945291709279023 : B738F3C4B8C80893 PRP: Verified PRP without proof (not generated)
2017-11-22	kkmrkkblmbrbk	C-PRP	M2207143/11590150945291709279023 : B738F3C4B8C80893 PRP: Verified PRP without proof (not generated)
2017-11-22	Lelikoid	F-ECM	Factor: 11590150945291709279023 / (ECM curve 2, B1=50000, B2=5000000)
2016-12-12	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
2015-12-07	Alexander Dubrovin	NF-PM1	B1=2000000, B2=65000000, E=12
2015-11-10	Alexander Dubrovin	NF-PM1	B1=2000000, B2=8000000, E=12
2015-11-10	Alexander Dubrovin	NF-PM1	B1=1500000, B2=5500000, E=6
2015-11-09	Alexander Dubrovin	NF-PM1	B1=1000000, B2=2500000, E=6
2015-10-21	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-17	Joss	NF-PM1	B1=148160
2014-06-24	Joss	NF-PM1	B1=119080
2013-12-04	LaurV	NF	no factor from 2^62 to 2^63
2011-01-09	markr	NF-PM1	B1=90000, B2=1642500, E=6
2011-01-01	Joss	NF-PM1	B1=30000
2010-11-14	Joss	NF-PM1	B1=20000
2010-11-05	Joss	NF-PM1	B1=15000
2009-01-08	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61

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