2 506 409 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
5402903308975288969	19	62.2	2011-10-02 09:46:07

ECM

Digits	B1	Curves
25	50000	61 / 280

Estimated T-Level: 21.1 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Gary Lowder	F29393DAE62C77C8	0
Verified (Factored)	1999-03-15	Robert Mutschler	F29393DAE62C77C8	1719097

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-15	kkmrkkblmbrbk	388E14DA5F25E446	1	1229617	5	3
Verified	2017-11-07	Oliver Kruse	388E14DA5F25E446	1	174208	5	3

History

Date	User	Type	Result
2023-01-28	USAFSS	NF-PM1	B1=288000, B2=290589390
2022-03-10	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-07	Oliver Kruse	C-PRP	M2506409/5402903308975288969 : 388E14DA5F25E446 PRP: Verified PRP without proof (not generated)
2017-10-15	kkmrkkblmbrbk	C-PRP	M2506409/5402903308975288969 : 388E14DA5F25E446 PRP: Verified PRP without proof (not generated)
2011-10-02	markr	F-PM1	Factor: 5402903308975288969
2011-01-04	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2010-12-16	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61