Though, I've also read, a few years ago, about things like "Rainbow Tables", that find patterns and stuff while trying to crack stuff, in a complicated way.
Now, Technology, and I'm thinking software now, is obviously evolving at increasing rate.
Nope, you won't be able to crack a privatekey with rainbow tables.
A brainwallet, maybe but a privatekey no, you 're simply beyond hardware capabilities to run them against this.
Never gets old: