3 233 663 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 =	8700000
B2 =	22323365610

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	73 / 640

Estimated T-Level: 25.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-05-01	Robert L. Klungle	2828A22D0261DE50	0
Verified	1999-06-26	Lars Geisler	2828A22D0261DE50	480670

History

Date	User	Type	Result
2025-07-03	Architects Cubed	NF	no factor from 2^70 to 2^71
2023-04-18	Sid & Andy	NF-PM1	B1=8700000, B2=22323365610
2022-12-01	Joss	NF-PM1	B1=1000000, B2=284427990
2022-02-16	TJAOI	NF	no factor from 2^69 to 2^70
2021-02-02	ViliamF	NF	no factor from 2^68 to 2^69
2020-01-19	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2018-11-26	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-25	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-09	Joss	NF-PM1	B1=375705, B2=8910000, E=6
2016-01-12	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4455000, E=6
2015-06-24	Tha	NF	no factor from 2^65 to 2^66
2015-02-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=99698
2014-06-11	Joss	NF-PM1	B1=79849
2012-12-30	dbaugh	NF	no factor from 2^62 to 2^63
2011-09-14	markr	NF	no factor from 2^61 to 2^62
2011-09-08	USAFSS	NF-PM1	B1=60000, B2=1035000, E=6
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=191250
2009-04-04	S485122	NF	no factor from 2^60 to 2^61

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