5 628 113 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
7941576894351309363937	22	72.7	2015-09-01 03:35:06

ECM

Digits	B1	Curves
25	50000	4 / 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)	1998-12-06	Takahiro Shakushi	25600ECB498EE56F	0
Verified (Factored)	2000-10-07	Franck TROMMENSCHLAGER	25600ECB498EE56F	4072182

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	E4C161D6655844BE	1	0	1	3
Verified	2018-07-15	Oliver Kruse	E4C161D6655844BE	1	1034156	1	3

History

Date	User	Type	Result
2018-07-15	Oliver Kruse	C-PRP	M5628113/7941576894351309363937 : E4C161D6655844BE PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M5628113/7941576894351309363937 : E4C161D6655844BE PRP: Verified PRP without proof (not generated)
2015-09-01	lopper	F-ECM	Factor: 7941576894351309363937 / (ECM curve 1, B1=50000, B2=5000000)
2014-11-17	monst	NF	no factor from 2^64 to 2^65
2014-11-15	Nesowa	NF	no factor from 2^63 to 2^64
2011-01-19	USAFSS	NF-PM1	B1=65000, B2=1023750, E=6
2009-06-06	Carsten Kossendey	NF-PM1	B1=30000, B2=397500
2009-02-08	GrunwalderGIMP	NF	no factor from 2^62 to 2^63