2 917 037 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶³

TF below 2^74 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	16488858750

ECM

Digits	B1	Curves
25	50000	204 / 280

Estimated T-Level: 23.6 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-06-28	Rick Dickinson	D2845BEB72D4909C	0
Verified	1999-05-16	Greg Hansen	D2845BEB72D4909C	1450628
Verified	2018-10-04	kkmrkkblmbrbk	D2845BEB72D4909C	2169401

History

Date	User	Type	Result
2023-12-27	mikr	NF-PM1	B1=10000000, B2=16488858750
2023-10-31	Joss	NF-PM1	B1=2594318, B2=5210925720
2023-10-14	Joss	NF-PM1	B1=2594318, B2=3655071420
2023-10-11	Joss	NF-PM1	B1=2594318, B2=1788046260
2023-10-09	Joss	NF-PM1	B1=2594318, B2=847615230
2023-10-09	Joss	NF-PM1	B1=2594318, B2=297802890
2023-09-15	Joss	NF-PM1	B1=1000000, B2=5360595240
2023-07-25	Joss	NF-PM1	B1=1000000, B2=2560071150
2023-05-09	Joss	NF-PM1	B1=1000000, B2=1201655910
2023-05-05	TJAOI	NF	no factor from 2^69 to 2^70
2023-03-08	Joss	NF-PM1	B1=1000000, B2=574695030
2021-05-31	TJAOI	NF	no factor from 2^68 to 2^69
2020-04-01	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2018-12-18	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-04	kkmrkkblmbrbk	C-LL	D2845BEB72D4909C
2017-11-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-02-22	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-25	VictordeHollander	NF-PM1	B1=1000000, B2=20000000, E=12
2015-04-25	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-25	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-12-22	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-15	markr	NF-PM1	B1=105000, B2=2283750, E=6
2010-11-13	Joss	NF-PM1	B1=15000
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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