2 765 303 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
64502074314673406473	20	65.8	2009-03-15 22:35:31

ECM

Digits	B1	Curves
25	50000	3 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Horng-Ming Chen	CD616E6060C0D77F	0
Verified (Factored)	1999-07-30	Alastair Knox	CD616E6060C0D77F	2088891

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-20	Oliver Kruse	55B659650AE17B5B	1	2003354	5	3
Verified	2017-12-06	kkmrkkblmbrbk	55B659650AE17B5B	1	2280747	5	3

History

Date	User	Type	Result
2023-01-27	USAFSS	NF-PM1	B1=288000, B2=226423890
2017-12-06	kkmrkkblmbrbk	C-PRP	M2765303/64502074314673406473 : 55B659650AE17B5B PRP: Verified PRP without proof (not generated)
2017-10-20	Oliver Kruse	C-PRP	M2765303/64502074314673406473 : 55B659650AE17B5B PRP: Verified PRP without proof (not generated)
2009-03-15	Aca Arsov	F-ECM	Factor: 64502074314673406473
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61