1 528 321 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
406984269075001223365559	24	78.4	2015-06-17 18:38:57

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	B9B1F1A66A612628	0
Verified (Factored)	1998-11-07	Murray Stenning	B9B1F1A66A612628	1374545

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-01	Oliver Kruse	5023ACA3CFE13567	1	0	1	3
Verified	2017-10-30	kkmrkkblmbrbk	5023ACA3CFE13567	1	9066	1	3

History

Date	User	Type	Result
2017-10-30	kkmrkkblmbrbk	C-PRP	M1528321/406984269075001223365559 : 5023ACA3CFE13567 PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1528321/406984269075001223365559 : 5023ACA3CFE13567 PRP: Verified PRP without proof (not generated)
2015-06-17	Chang Chia-Tche	F-ECM	Factor: 406984269075001223365559 / (ECM curve 1, B1=50000, B2=5000000)
2015-03-03	VictordeHollander	NF-PM1	B1=10000000, B2=200000000, E=12
2015-02-04	snme2pm1	NF	no factor from 2^64 to 2^65
2015-02-04	snme2pm1	NF	no factor from 2^63 to 2^64
2011-09-04	BigBrother	NF-PM1	B1=1000000, B2=100000000, E=12
2011-01-31	James Heinrich	NF-PM1	B1=80000, B2=1340000, E=6
2010-07-24	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-26	Architects Cubed	NF	no factor from 2^60 to 2^61