3 155 609 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷¹

TF target 2⁶⁴

TF below 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10300000
B2 =	19793660250

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	57 / 640

Estimated T-Level: 25.4 ⓘ

Status	Date	User	Residue	Shift
Verified		Robert Bowers	2C1D4E630A198ABD	0
Verified	1999-06-06	John Lawrence	2C1D4E630A198ABD	29550

History

Date	User	Type	Result
2025-07-21	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-04-11	Sid & Andy	NF-PM1	B1=10300000, B2=19793660250
2023-02-10	TJAOI	NF	no factor from 2^69 to 2^70
2023-01-29	Joss	NF-PM1	B1=1000000, B2=284427990
2021-05-03	TJAOI	NF	no factor from 2^68 to 2^69
2019-05-23	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2019-01-28	TJAOI	NF	no factor from 2^67 to 2^68
2017-04-22	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-09-01	Joss	NF-PM1	B1=453084, B2=12255000, E=12
2015-06-17	Tha	NF	no factor from 2^65 to 2^66
2015-05-13	Squeeky_Squirrel	NF-PM1	B1=215000, B2=6127500, E=12
2015-02-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-10	Joss	NF-PM1	B1=95680
2014-05-06	Joss	NF-PM1	B1=75340
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-01	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-09-08	Squeeky_Squirrel	NF-PM1	B1=55000, B2=948750, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-11	S485122	NF	no factor from 2^60 to 2^61

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