2 393 263 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
419202676952144754583	21	68.5	2015-08-10 16:28:36

ECM

Digits	B1	Curves
25	50000	69 / 280

Estimated T-Level: 21.2 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Joe Decker	F57036BF2E0174BE	0
Verified (Factored)	1999-05-30	Andrew L. Neporada	F57036BF2E0174BE	1854874

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	Oliver Kruse	9A5958243C334DBE	1	2182260	5	3
Verified	2017-11-26	kkmrkkblmbrbk	9A5958243C334DBE	1	972062	5	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-26	kkmrkkblmbrbk	C-PRP	M2393263/419202676952144754583 : 9A5958243C334DBE PRP: Verified PRP without proof (not generated)
2017-10-12	Oliver Kruse	C-PRP	M2393263/419202676952144754583 : 9A5958243C334DBE PRP: Verified PRP without proof (not generated)
2015-08-10	guru	F-ECM	Factor: 419202676952144754583 / (ECM curve 1, B1=50000, B2=5000000)
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
2014-09-16	-Anonymous-	NF-PM1	B1=126819
2013-12-04	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-06-02	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-12-24	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-15	Joss	NF-PM1	B1=20000
2010-11-08	Joss	NF-PM1	B1=15000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61