269 167 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 2^113 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	110000000
B2 =	4524107517930

ECM

Estimated T-Level: 35.6 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	43CD	0
Verified		Unknown	43CD	0
Verified		Brian J. Beesley	24E2E9A357D6C3CD	0
Verified		Eivind Triel	24E2E9A357D6C3CD	4720
Verified	2001-11-10	Brian J. Beesley	24E2E9A357D6C3CD	91241

History

Date	User	Type	Result
2025-08-22	tim s	NF	no factor from 2^66 to 2^67
2023-02-05	masser	NF-PP1	Start=6/5, B1=20000000, B2=620000000
2023-01-30	masser	NF-PP1	Start=81/31, B1=20000000, B2=620000000
2023-01-27	masser	NF-PP1	Start=2/7, B1=20000000, B2=620000000
2022-06-02	Sid & Andy	NF-PM1	B1=110000000, B2=4524107517930
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-01-04	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-22	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-05-11	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-05-09	Joss	NF-PM1	B1=10780000, B2=194040000, E=12
2016-03-29	Joss	NF-PM1	B1=5929000
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-12-08	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-08	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-08-27	David Campeau	NF-PM1	B1=5390000, B2=194040000, E=12
2013-07-06	lycorn	NF	no factor from 2^60 to 2^61
2012-02-26	Joss	NF-PM1	B1=2277056
2011-02-16	Joss	NF-PM1	B1=2000000
2009-01-25	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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