284 591 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁷

TF target 2⁴⁴

TF below 2^102 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	146000000
B2 =	2994387996600

ECM

Estimated T-Level: 32.1 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	ADD	0
Verified		Unknown	0ADD	0
Verified		Brian J. Beesley	DBB797A4297C8ADD	0
Verified		Eivind Triel	DBB797A4297C8ADD	72849
Verified	2002-03-03	Brian J. Beesley	DBB797A4297C8ADD	221673

History

Date	User	Type	Result
2024-07-24	tim s	NF	no factor from 2^66 to 2^67
2023-02-05	masser	NF-PP1	Start=6/5, B1=20000000, B2=620000000
2023-01-28	masser	NF-PP1	Start=73/43, B1=20000000, B2=620000000
2023-01-27	masser	NF-PP1	Start=2/7, B1=20000000, B2=620000000
2022-06-23	Sid & Andy	NF-PM1	B1=146000000, B2=2994387996600
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-12-03	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-29	BloodERazor	NF	no factor from 2^64 to 2^65
2018-03-29	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-05-22	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-05-18	Joss	NF-PM1	B1=10520000, B2=189360000, E=12
2016-05-13	Numberwang	NF-PM1	B1=3182, B2=79550
2016-01-06	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-06	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-11-02	David Campeau	NF-PM1	B1=5260000, B2=199880000, E=12
2013-06-24	lycorn	NF	no factor from 2^60 to 2^61
2012-05-15	Joss	NF-PM1	B1=5084029
2012-02-26	Joss	NF-PM1	B1=2118345
2011-02-18	Joss	NF-PM1	B1=2000000
2009-01-23	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59

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