4 927 409 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
985481801	9	29.9	old
252285247618589639	18	57.8	2015-07-17 10:45:18

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	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	3C3F12E9FFEFB97C	2	0	1	3
Verified	2018-04-13	Oliver Kruse	3C3F12E9FFEFB97C	2	4101046	1	3

History

Date	User	Type	Result
2023-09-20	USAFSS	NF-PM1	B1=256000, B2=105522060
2018-04-13	Oliver Kruse	C-PRP	M4927409/985481801/252285247618589639 : 3C3F12E9FFEFB97C PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4927409/252285247618589639/985481801 : 3C3F12E9FFEFB97C PRP: Verified PRP without proof (not generated)
2015-07-17	TJAOI	F	Factor: 252285247618589639 / TF: 57-58