2 144 041 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 =	10000000
B2 =	30495202920

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	150 / 640

Estimated T-Level: 26.2 ⓘ

Status	Date	User	Residue	Shift
Verified		Bj”rn Edstam	8EEA8B26CBC8ADAE	0
Verified	1999-02-21	Patrick Fossano	8EEA8B26CBC8ADAE	0
Verified	1999-05-30	Martin Mauerböck	8EEA8B26CBC8ADAE	1275964

History

Date	User	Type	Result
2025-06-17	Joss	NF-PM1	B1=10000000, B2=30495202920
2025-03-12	Joss	NF-PM1	B1=10000000, B2=20434912680
2025-02-07	Joss	NF-PM1	B1=10000000, B2=10374622440
2024-05-05	Greg	NF	no factor from 2^69 to 2^70
2023-02-02	Architects Cubed	NF	no factor from 2^69 to 2^70
2022-12-23	Architects Cubed	NF-PM1	B1=5000000, B2=16690269750
2021-08-02	TJAOI	NF	no factor from 2^68 to 2^69
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2017-11-09	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-04-27	Joss	NF-PM1	B1=422229, B2=4222290, E=6
2017-04-22	Joss	NF-PM1	B1=351858, B2=3518580, E=6
2016-11-12	Joss	NF-PM1	B1=211114
2016-10-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-05	Joss	NF-PM1	B1=175929, B2=5265000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-11-01	Joss	NF-PM1	B1=159936
2013-09-07	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-21	James Heinrich	NF-PM1	B1=130000, B2=2632500, E=6
2011-01-13	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-06	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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