7 291 519 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
18628035398037835973393	23	74.0	2017-12-14 06:30:04

ECM

Digits	B1	Curves
25	50000	5 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2000-05-05	Roland Wintgen	6A21FEA8E215979A	3368172
Verified (Factored)	2002-02-17	Ivan Clarke	6A21FEA8E215979A	340953

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-02-26	Oliver Kruse	1318FABDE2DBFF86	1	5870444	5	3
Verified	2019-04-29	kkmrkkblmbrbk	1318FABDE2DBFF86	1	1940509	5	3

History

Date	User	Type	Result
2019-04-29	kkmrkkblmbrbk	C-PRP	M7291519/18628035398037835973393 : 1318FABDE2DBFF86 PRP: Verified PRP without proof (not generated)
2018-02-26	Oliver Kruse	C-PRP	M7291519/18628035398037835973393 : 1318FABDE2DBFF86 PRP: Verified PRP without proof (not generated)
2017-12-14	bam	F-ECM	Factor: 18628035398037835973393 / (ECM curve 2, B1=50000, B2=5000000)
2016-10-19	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-06-16	VictordeHollander	NF	no factor from 2^65 to 2^66
2013-11-19	David Campeau	NF	no factor from 2^64 to 2^65
2013-11-03	Nesowa	NF	no factor from 2^63 to 2^64
2012-08-31	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1620000, E=6
2009-08-13	Carsten Kossendey	NF-PM1	B1=40000, B2=610000, E=4