3 139 789 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 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	9500000
B2 =	24374334600

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	101 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Joel Armengaud	30FED8DAF11A5B50	0
Verified	1999-12-30	Michael Lyons	30FED8DAF11A5B50	610970

History

Date	User	Type	Result
2025-07-12	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-03-04	Sid & Andy	NF-PM1	B1=9500000, B2=24374334600
2022-12-02	TJAOI	NF	no factor from 2^69 to 2^70
2021-03-23	TJAOI	NF	no factor from 2^68 to 2^69
2019-02-15	mikr	NF-PM1	B1=3000000, B2=100000000, E=12
2019-01-07	TJAOI	NF	no factor from 2^67 to 2^68
2018-12-28	King	NF-PM1	B1=2295435, B2=64272176
2018-08-15	Joss	NF-PM1	B1=420000, B2=3780000
2018-08-14	Joss	NF-PM1	B1=420000, B2=3360000
2018-08-13	Joss	NF-PM1	B1=420000, B2=2940000
2018-08-07	Joss	NF-PM1	B1=420000, B2=1260000
2018-08-06	Joss	NF-PM1	B1=420000, B2=840000
2017-04-17	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-06-14	Tha	NF	no factor from 2^65 to 2^66
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
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-11-11	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-11-02	markr	NF-PM1	B1=210000, B2=5460000, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=183750
2009-04-12	S485122	NF	no factor from 2^60 to 2^61

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