1 947 779 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
15582233	8	23.9	old
26411883241	11	34.6	2008-07-15 07:48:34
9686223165106340833919	22	73.0	2021-04-05 09:32:51

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)	2017-10-05	Oliver Kruse	8EB44A2367805C67	2	0	1	3
Verified (Factored)	2017-11-11	kkmrkkblmbrbk	8EB44A2367805C67	2	846016	1	3
Verified	2021-04-07	Joe S.	C168FDC4A7B9CD5D	3	548799	5	3

History

Date	User	Type	Result
2021-04-07	curtisc	CERT	PRP Certification Proof certified good
2021-04-07	Joe S.	C-PRP	M1947779/15582233/26411883241/9686223165106340833919 : C168FDC4A7B9CD5D PRP proof power = 7 PRP: Verified Proof certified good
2021-04-05	MarkS	F-ECM	Factor: 9686223165106340833919 / (ECM curve 5, B1=50000, B2=5000000, Sigma=5950546183628360)
2017-11-11	kkmrkkblmbrbk	C-PRP	M1947779/15582233/26411883241 : 8EB44A2367805C67 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1947779/15582233/26411883241 : 8EB44A2367805C67 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 26411883241