1 543 207 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
42664513229964533489	20	65.2	2015-01-06 12:36:19

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)		Lee Middle School	AF3020FC8BD1C5A0	0
Verified (Factored)	1998-11-07	Paul Victor Novarese	AF3020FC8BD1C5A0	1122549

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-01	Oliver Kruse	9FE4AF51B49FE4CC	1	0	1	3
Verified	2017-10-30	kkmrkkblmbrbk	9FE4AF51B49FE4CC	1	26889	1	3

History

Date	User	Type	Result
2017-10-30	kkmrkkblmbrbk	C-PRP	M1543207/42664513229964533489 : 9FE4AF51B49FE4CC PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1543207/42664513229964533489 : 9FE4AF51B49FE4CC PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-01-06	Chang Chia-Tche	F-ECM	Factor: 42664513229964533489 / (ECM curve 3, B1=50000, B2=5000000)
2013-11-20	David Campeau	NF-PM1	B1=945000, B2=27405000, E=12
2011-02-03	James Heinrich	NF-PM1	B1=80000, B2=1340000, E=6
2010-05-19	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-28	Architects Cubed	NF	no factor from 2^60 to 2^61