4 128 869 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
62585396303	11	35.9	old
41989729931902441223	20	65.2	2018-07-17 10:16:04

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 (Factored)	2017-11-15	Oliver Kruse	7DC0DB928D7FA1B0	1	767551	5	3
Verified (Factored)	2017-12-26	kkmrkkblmbrbk	7DC0DB928D7FA1B0	1	3013104	5	3
Verified	2018-07-24	_p95holder_	7DC0DB928D7FA1B0	2	2947171	5	3

History

Date	User	Type	Result
2022-10-29	USAFSS	NF-PM1	B1=200000, B2=135233670
2018-07-24	_p95holder_	C-PRP	M4128869/62585396303/41989729931902441223 : 7DC0DB928D7FA1B0 PRP: Verified PRP without proof (not generated)
2018-07-17	TJAOI	F	Factor: 41989729931902441223 / TF: 65-66
2017-12-26	kkmrkkblmbrbk	C-PRP	M4128869/62585396303 : 7DC0DB928D7FA1B0 PRP: Verified PRP without proof (not generated)
2017-11-15	Oliver Kruse	C-PRP	M4128869/62585396303 : 7DC0DB928D7FA1B0 PRP: Verified PRP without proof (not generated)