3 779 021 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 =	20000000
B2 =	20124394290

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	72 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Bad		Ari Kullberg	63AE0C149661255E	0
Verified	1999-11-24	Smegheads	9AF6A60A086ED6FC	3382438
Verified	2000-03-01	Paulo Carvalho	9AF6A60A086ED6FC	1759695

History

Date	User	Type	Result
2025-02-27	Joss	NF-PM1	B1=20000000, B2=20124394290
2025-02-27	Joss	NF-PM1	B1=20000000, B2=10027887870
2025-02-07	TJAOI	NF	no factor from 2^70 to 2^71
2023-01-04	mikr	NF-PM1	B1=8000000, B2=11215115142
2022-12-13	Joss	NF-PM1	B1=1000000, B2=217643790
2021-04-04	axn	NF	no factor from 2^69 to 2^70
2020-11-16	TJAOI	NF	no factor from 2^68 to 2^69
2019-02-08	Yxinity	NF	no factor from 2^67 to 2^68
2018-12-31	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-15	mikr	NF-PM1	B1=1600000, B2=66000000, E=12
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
2015-01-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-04-13	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2062500, E=6
2012-03-23	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-04-09	markr	NF	no factor to 2^62
2009-07-13	Carsten Kossendey	NF-PM1	B1=20000, B2=265000
2009-03-03	S485122	NF	no factor from 2^60 to 2^61

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