2 001 511 Exponent Status

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁶²

Factored

Factor	Digits	Bits	Date
19885661711344389415428507505282354958833	41	133.9	2013-11-11 19:27:22

P-1 factors

Date	Factors	B1	B2
2013-11-11	19885661711344389415428507505282354958833	100000000	5000000000

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	129 / 640

Estimated T-Level: 26.0 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Bruce Bailey	0BD6D2C55A43967F	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-05-02	Leon Helmink	0BD6D2C55A43967F	1181451	Windows,Prime95,v18,(aka WU1)
Factored	2012-06-18	Gaurav Khanna	0BD6D2C55A43967F	0	MacLucasFFTW v8.1 Ballester

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-05	Oliver Kruse	2D0FED88C61EF355	1	0	1	3
Verified	PRP without proof (not generated)	2017-11-13	kkmrkkblmbrbk	2D0FED88C61EF355	1	1955612	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor TF: 1-60
2017-11-13	kkmrkkblmbrbk	C-PRP	M2001511/19885661711344389415428507505282354958833 : 2D0FED88C61EF355
2017-10-05	Oliver Kruse	C-PRP	M2001511/19885661711344389415428507505282354958833 : 2D0FED88C61EF355
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-11-11	BloodIce	F-PM1	Factor: 19885661711344389415428507505282354958833
2013-07-16	BloodIce	NF	no factor TF: 67-68
2013-07-16	BloodIce	NF	no factor TF: 66-67
2013-06-11	BloodIce	NF-PM1	B1=10000000, B2=200000000, E=12
2013-02-28	BloodIce	NF	no factor TF: 65-66
2013-02-28	BloodIce	NF	no factor TF: 64-65
2013-02-28	BloodIce	NF	no factor TF: 63-64
2013-02-17	BloodIce	NF-PM1	B1=6000000, B2=60000000, E=12
2013-02-03	dbaugh	NF	no factor TF: 62-63
2012-06-18	Gaurav Khanna	C-LL	0BD6D2C55A43967F
2011-12-23	Sebastian Hornbostel	NF	no factor TF: 61-62
2010-11-21	Joss	NF-PM1	B1=200151
2009-01-02	Sturle Sunde	NF	no factor TF: 60-61
2007-02-05	markr	NF-PM1	B1=25000, B2=387500
2007-02-05	markr	NF-PM1	B1=50000, B2=1000000, E=6
2003-11-16	-anonymous-	NF-PM1	B1=2048, B2=204800
2002-04-28	Joss	NF-PM1	B1=4000, B2=4000
2002-04-28	Joss	NF-PM1	B1=2000, B2=2000
2002-04-28	Joss	NF-PM1	B1=10000, B2=10000
1999-05-02	-anonymous-	C-LL	0BD6D2C55A43967F
1999-01-02	-anonymous-	NF	no factor TF: 1-58

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