I actually know how private key and public key works. But I don't know how to brute force private key. In calculation it is impposible. But with luck anything is possible. What I mean is this: If we know how many digits a private key has in general, and using sha-256 processor, if we calculate from 0-infinity then it is really hard. But if we start from middle randomly can we find it like in 2 years or 50 years. I assume yes.
So is there a programme brute force randomly for private keys? Or can we do something like that?