2 259 217 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
348395472999707409530239	24	78.2	2021-05-08 00:52:54

ECM

Digits	B1	Curves
25	50000	129 / 280

Estimated T-Level: 22.3 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ashley Hatch	29F53F045D82E960	0
Verified (Factored)		Stephen Nichols	29F53F045D82E960	0
Verified (Factored)	1999-03-01	Brad Benton	29F53F045D82E960	558551

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-05-10	Zero	5DDC44C92BAE619A	1	1529434	5	3

History

Date	User	Type	Result
2021-05-10	curtisc	CERT	PRP Certification Proof certified good
2021-05-10	Zero	C-PRP	M2259217/348395472999707409530239 : 5DDC44C92BAE619A PRP proof power = 7 PRP: Verified Proof certified good
2021-05-08	Zenzoma	F-ECM	Factor: 348395472999707409530239 / (ECM curve 5, B1=50000, B2=5000000, Sigma=3434107338427649)
2019-06-29	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2017-01-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-26	Joss	NF-PM1	B1=342144, B2=3421440, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-02	Joss	NF-PM1	B1=128410
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-05	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-05	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-12	Joss	NF-PM1	B1=30000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-12	Sturle Sunde	NF	no factor from 2^60 to 2^61