4 458 877 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
31587145807451679112319	23	74.7	2010-01-08 07:39:14

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)	1998-03-31	Blaine Deal	37B83F6F7BC88147	0
Bad	2000-04-12	Bruce Hebden	FF7CBB6D7731795F	1020739
Verified (Factored)	2001-04-08	Paul Victor Novarese	37B83F6F7BC88147	2738677

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	51D1E866290045E8	1	0	1	3
Verified	2018-02-15	Oliver Kruse	51D1E866290045E8	1	4161517	1	3

History

Date	User	Type	Result
2023-03-15	USAFSS	NF-PM1	B1=224000, B2=127224240
2018-02-15	Oliver Kruse	C-PRP	M4458877/31587145807451679112319 : 51D1E866290045E8 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4458877/31587145807451679112319 : 51D1E866290045E8 PRP: Verified PRP without proof (not generated)
2010-01-08	Martti Järvi	F-ECM	Factor: 31587145807451679112319