I read here that:
If you could process one trillion private keys per second, it would take more than one million times the age of the universe to count them all. Even worse, just enumerating these keys would consume more than the total energy output of the sun for 32 years.
However this website http://directory.io says that they generated all private keys. Who is right? or what is it that I misunderstand ?
And why this (from here)
A private key is a 256-bit value, meaning there are approximately 1.1579e77 possible keys (There are about 1.2288e66 invalid values...