4 693 217 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
81241117448040733537	20	66.1	old

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)	1998-08-30	Michael Lyons	33C0FADEB5FAAE8B	0
Verified (Factored)	1999-12-30	Upper Silesia	33C0FADEB5FAAE8B	3576912

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	045FF53914981BE4	1	0	1	3
Verified	2018-03-09	Oliver Kruse	045FF53914981BE4	1	2575823	1	3

History

Date	User	Type	Result
2023-09-06	USAFSS	NF-PM1	B1=240000, B2=91991760
2018-03-09	Oliver Kruse	C-PRP	M4693217/81241117448040733537 : 045FF53914981BE4 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4693217/81241117448040733537 : 045FF53914981BE4 PRP: Verified PRP without proof (not generated)