2 154 487 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁹

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	149 / 640

Estimated T-Level: 26.2 ⓘ

Status	Date	User	Residue	Shift
Verified		Jean-Yves Canart	F062139088977DF6	0
Verified	1999-01-29	Michael Boss	F062139088977DF6	611297
Verified	2018-04-09	kkmrkkblmbrbk	F062139088977DF6	891638

History

Date	User	Type	Result
2025-06-18	Joss	NF-PM1	B1=10000000, B2=30495202920
2025-04-01	Joss	NF-PM1	B1=10000000, B2=20434912680
2025-03-09	Joss	NF-PM1	B1=10000000, B2=10374622440
2022-12-25	Architects Cubed	NF-PM1	B1=5000000, B2=9896994030
2021-07-29	TJAOI	NF	no factor from 2^68 to 2^69
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-09	kkmrkkblmbrbk	C-LL	F062139088977DF6
2017-12-20	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-08	Joss	NF-PM1	B1=360000, B2=6480000, E=12
2016-03-20	Joss	NF-PM1	B1=269622
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-01	Joss	NF-PM1	B1=149791
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2011-01-24	markr	NF-PM1	B1=120000, B2=2340000, E=6
2011-01-15	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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