3 938 197 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 2^77 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	13408004610

ECM

Digits	B1	Curves
25	50000	269 / 280

Estimated T-Level: 24.8 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-07-11	Gary Untermeyer	F5A484479D9A4198	0
Verified	1999-12-30	Carlo Baffa	F5A484479D9A4198	1041518

History

Date	User	Type	Result
2024-09-29	Joss	NF-PM1	B1=10000000, B2=13408004610
2023-07-02	Sid & Andy	NF-PM1	B1=5200000, B2=16199353170
2023-02-12	Joss	NF-PM1	B1=1000000, B2=285449010
2022-10-10	Joss	NF-PM1	B1=1000000, B2=119860650
2022-05-13	Joss	NF-PM1	B1=500000, B2=119860650
2021-06-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-04-28	axn	NF	no factor from 2^69 to 2^70
2020-05-08	TJAOI	NF	no factor from 2^68 to 2^69
2019-01-07	TJAOI	NF	no factor from 2^67 to 2^68
2019-01-07	Yxinity	NF	no factor from 2^67 to 2^68
2017-07-10	Joss	NF-PM1	B1=380160, B2=3801600, E=6
2016-12-11	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-02	Joss	NF-PM1	B1=190080, B2=3421440
2016-04-29	Joss	NF-PM1	B1=190080, B2=2997014, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-14	ramgeis	NF	no factor from 2^65 to 2^66
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
2014-11-10	Joss	NF-PM1	B1=86298
2012-02-20	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-09-28	Squeeky_Squirrel	NF-PM1	B1=70000, B2=1190000, E=6
2011-03-11	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-08-01	Carsten Kossendey	NF-PM1	B1=20000, B2=285000
2009-01-02	Architects Cubed	NF	no factor from 2^60 to 2^61

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