3 847 577 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 =	11524230
B2 =	10125046470

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	63 / 640

Estimated T-Level: 25.5 ⓘ

Status	Date	User	Residue	Shift
Verified		David A McGough	03EC65A796525E8B	0
Verified	1999-09-22	Daval Davis	03EC65A796525E8B	1059889

History

Date	User	Type	Result
2025-04-20	Joss	NF-PM1	B1=11524230, B2=10125046470
2025-03-06	TJAOI	NF	no factor from 2^70 to 2^71
2024-04-24	Joss	NF-PM1	B1=10000000, B2=10002782790
2023-12-14	Joss	NF-PM1	B1=2322335, B2=2389066680
2022-05-17	DRobinsonPE	NF	no factor from 2^69 to 2^70
2021-02-11	axn	NF-PM1	B1=15000000, B2=750000000
2020-11-23	Carlos Pinho	NF-PM1	B1=173000, B2=4675000, E=6
2020-09-07	TJAOI	NF	no factor from 2^68 to 2^69
2018-07-23	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-21	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-28	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-03	Joss	NF-PM1	B1=239500, B2=2395000, E=6
2015-01-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-18	Joss	NF-PM1	B1=86682
2012-02-20	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-24	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1137500, E=6
2011-03-02	markr	NF	no factor from 2^61 to 2^62
2009-07-27	Carsten Kossendey	NF-PM1	B1=20000, B2=270000
2009-02-23	S485122	NF	no factor from 2^60 to 2^61

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