1 788 509 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
21141362248473527347681	23	74.2	2011-02-07 12:32:43

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	108 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ed Knapton	9253982A8CFA56BB	0
Verified (Factored)	1998-12-06	James Dunkerley	9253982A8CFA56BB	847809

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-03	Oliver Kruse	847B042B09A96BFD	1	0	1	3
Verified	2017-11-05	kkmrkkblmbrbk	847B042B09A96BFD	1	452659	1	3

History

Date	User	Type	Result
2017-11-05	kkmrkkblmbrbk	C-PRP	M1788509/21141362248473527347681 : 847B042B09A96BFD PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1788509/21141362248473527347681 : 847B042B09A96BFD PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-02-07	Carsten Kossendey	F-PM1	Factor: 21141362248473527347681
2010-10-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-20	Architects Cubed	NF	no factor from 2^60 to 2^61