2 874 089 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 2^80 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	20483266440

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	84 / 640

Estimated T-Level: 25.7 ⓘ

Status	Date	User	Residue	Shift
Verified		Dax Prather	83F1542A2A820A2C	0
Verified	1998-08-30	Gary Hanson	83F1542A2A820A2C	0
Verified	1999-05-30	Eric Wegrzynowski	83F1542A2A820A2C	956528

History

Date	User	Type	Result
2024-06-05	Joss	NF-PM1	B1=10000000, B2=20483266440
2023-11-10	Joss	NF-PM1	B1=2609755, B2=5617073280
2023-10-02	Joss	NF-PM1	B1=1000000, B2=9301342050
2023-09-14	Joss	NF-PM1	B1=1000000, B2=4527142620
2023-09-08	TJAOI	NF	no factor from 2^69 to 2^70
2023-05-24	Joss	NF-PM1	B1=1000000, B2=2085523440
2021-05-27	TJAOI	NF	no factor from 2^68 to 2^69
2020-03-03	masser	NF-PM1	B1=5000000, B2=200000000, E=12
2019-10-23	masser	NF-PM1	B1=2880000, B2=28800000, E=12
2019-01-09	chuenkit	NF	no factor from 2^67 to 2^68
2017-11-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-08-19	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-18	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-23	markr	NF	no factor from 2^61 to 2^62
2011-02-07	markr	NF-PM1	B1=200000, B2=5250000, E=6
2011-01-22	Joss	NF-PM1	B1=50000
2010-12-23	Joss	NF-PM1	B1=20000
2009-07-03	Carsten Kossendey	NF-PM1	B1=15000, B2=161250
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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