2 061 287 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
951846986940559395047	21	69.7	2020-02-23 02:39:50

ECM

Digits	B1	Curves
25	50000	152 / 280

Estimated T-Level: 22.7 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Tony Neilson	380AC892E9C578AE	0
Verified (Factored)	1998-05-01	Steinar H. Gunderson	380AC892E9C578AE	0
Verified (Factored)	1999-02-14	Hivey	380AC892E9C578AE	717654

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-02-23	Jinyuan Wang	08E90D17C140B61E	1	1077259	5	3
Verified	2020-02-25	James Heinrich	08E90D17C140B61E	1	459664	5	3

History

Date	User	Type	Result
2020-02-25	James Heinrich	C-PRP	M2061287/951846986940559395047 : 08E90D17C140B61E PRP: Verified PRP without proof (not generated)
2020-02-23	Jinyuan Wang	C-PRP	M2061287/951846986940559395047 : 08E90D17C140B61E PRP: Verified PRP without proof (not generated)
2020-02-23	mnd9	F-ECM	Factor: 951846986940559395047 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4247771963390208)
2019-03-25	chuenkit	NF	no factor from 2^67 to 2^68
2017-02-19	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-11-06	Joss	NF-PM1	B1=315793
2016-11-04	Joss	NF-PM1	B1=263161
2016-11-03	Joss	NF-PM1	B1=219301
2016-09-28	Joss	NF-PM1	B1=182751, B2=13932000, E=12
2016-08-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-25	Joss	NF-PM1	B1=182751, B2=5805000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-26	Joss	NF-PM1	B1=166138
2013-09-01	ramgeis	NF	no factor from 2^62 to 2^63
2012-03-12	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-21	James Heinrich	NF-PM1	B1=135000, B2=2902500, E=6
2011-01-06	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2009-06-21	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61

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