2 050 567 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶²

TF below 2^82 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	15400000
B2 =	47011244280

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	158 / 640

Estimated T-Level: 26.2 ⓘ

Status	Date	User	Residue	Shift
Verified		Ira Machefsky	479B73BE59B1B2A4	0
Verified	1999-04-13	Ethan O'Connor	479B73BE59B1B2A4	938509
Verified	1999-04-23	Jean-Philippe GARSZTKA	479B73BE59B1B2A4	750015

History

Date	User	Type	Result
2023-08-24	Sid & Andy	NF-PM1	B1=15400000, B2=47011244280
2023-02-19	Joss	NF-PM1	B1=1000000, B2=17867918250
2023-02-09	Architects Cubed	NF	no factor from 2^69 to 2^70
2023-01-28	Joss	NF-PM1	B1=1000000, B2=710870160
2021-08-05	TJAOI	NF	no factor from 2^68 to 2^69
2019-08-13	mikr	NF-PM1	B1=4000000, B2=200000000, E=12
2019-07-02	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-03-23	chuenkit	NF	no factor from 2^67 to 2^68
2016-08-13	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
2015-11-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-10-06	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-04-13	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-13	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-22	Joss	NF-PM1	B1=166301
2013-09-01	ramgeis	NF	no factor from 2^62 to 2^63
2012-03-09	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-26	James Heinrich	NF-PM1	B1=135000, B2=2868750, E=6
2011-01-04	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2009-05-12	Rob_Dee	NF-PM1	B1=20000, B2=280000
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61

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