1 866 869 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
102697911301293719	18	56.5	old
2830992842209793999449	22	71.3	2020-12-23 02:09:58

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	4A676810478AA1CE	1	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	4A676810478AA1CE	1	864096	1	3
Verified	2020-12-23	Maciej Kmieciak	4242ADFE5DC0EFE8	2	1779929	5	3

History

Date	User	Type	Result
2020-12-23	Franklin Webber	CERT	PRP Certification Proof certified good
2020-12-23	Maciej Kmieciak	C-PRP	M1866869/102697911301293719/2830992842209793999449 : 4242ADFE5DC0EFE8 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-23	MarkS	F-ECM	Factor: 2830992842209793999449 / (ECM curve 12, B1=50000, B2=5000000, Sigma=5356145815986903)
2017-11-07	kkmrkkblmbrbk	C-PRP	M1866869/102697911301293719 : 4A676810478AA1CE PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1866869/102697911301293719 : 4A676810478AA1CE PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12