2 905 607 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 2^77 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	71967946050

ECM

Digits	B1	Curves
25	50000	262 / 280

Estimated T-Level: 24.7 ⓘ

Status	Date	User	Residue	Shift
Verified		Robert Evans	558FFC4CB528B1F9	0
Verified	1999-05-23	Bret Hays	558FFC4CB528B1F9	1869287
Verified	2018-10-01	kkmrkkblmbrbk	558FFC4CB528B1F9	1571833

History

Date	User	Type	Result
2024-01-14	mikr	NF-PM1	B1=10000000, B2=71967946050
2023-11-02	Joss	NF-PM1	B1=2598395, B2=5439246120
2023-10-14	Joss	NF-PM1	B1=2598395, B2=4789724940
2023-10-13	Joss	NF-PM1	B1=2598395, B2=2300371920
2023-10-09	Joss	NF-PM1	B1=2598395, B2=1001329560
2023-10-09	Joss	NF-PM1	B1=2598395, B2=351808380
2023-09-15	Joss	NF-PM1	B1=1000000, B2=5135233950
2023-05-26	Joss	NF-PM1	B1=1000000, B2=2537149230
2022-11-24	Architects Cubed	NF	no factor from 2^69 to 2^70
2021-06-07	TJAOI	NF	no factor from 2^68 to 2^69
2020-03-23	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2018-12-17	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-01	kkmrkkblmbrbk	C-LL	558FFC4CB528B1F9
2017-11-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 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
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2011-12-10	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-01-28	markr	NF-PM1	B1=105000, B2=2283750, E=6
2010-12-24	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=168750
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password