3 974 221 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
4736379353706221359	19	62.0	2009-07-27 16:14:53

ECM

Digits	B1	Curves
25	50000	3 / 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)	1998-01-13	Manfred Toplic	B3D49D47071FA776	0
Verified (Factored)	1999-10-07	Steve Paltzer	B3D49D47071FA776	1966114

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	60FF8B699F5E1AB9	1	0	1	3
Verified	2018-01-02	Oliver Kruse	60FF8B699F5E1AB9	1	2909105	1	3

History

Date	User	Type	Result
2022-09-29	Joss	NF-PM1	B1=1000000, B2=113097600
2022-05-11	Joss	NF-PM1	B1=500000, B2=113097600
2022-04-19	Joss	NF-PM1	B1=300000
2018-01-02	Oliver Kruse	C-PRP	M3974221/4736379353706221359 : 60FF8B699F5E1AB9 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M3974221/4736379353706221359 : 60FF8B699F5E1AB9 PRP: Verified PRP without proof (not generated)
2009-07-27	Carsten Kossendey	F-PM1	Factor: 4736379353706221359