3 866 879 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 =	10000000
B2 =	13803860070

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	90 / 640

Estimated T-Level: 25.7 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-09-06	Dave Wilson	53A44AD0E6FFED3F	0
Verified	2000-04-27	Menegoll	53A44AD0E6FFED3F	1542299

History

Date	User	Type	Result
2024-08-12	TJAOI	NF	no factor from 2^70 to 2^71
2024-04-29	Joss	NF-PM1	B1=10000000, B2=13803860070
2023-12-25	Joss	NF-PM1	B1=2317691, B2=2389066680
2022-09-29	Joss	NF-PM1	B1=1000000, B2=130364850
2022-04-01	mikr	NF	no factor from 2^69 to 2^70
2021-03-24	axn	NF-PM1	B1=15000000, B2=750000000
2020-11-23	Carlos Pinho	NF-PM1	B1=170000, B2=4705000, E=6
2020-08-24	TJAOI	NF	no factor from 2^68 to 2^69
2019-01-25	Yxinity	NF	no factor from 2^67 to 2^68
2016-11-25	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-29	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-27	Joss	NF-PM1	B1=229996, B2=2299960, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-01-14	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-14	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-22	Joss	NF-PM1	B1=86598
2012-02-29	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-19	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1137500, E=6
2011-02-18	markr	NF	no factor from 2^61 to 2^62
2009-07-29	Carsten Kossendey	NF-PM1	B1=20000, B2=275000
2009-02-25	S485122	NF	no factor from 2^60 to 2^61

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