PGP

I was wondering if anyone has an answer to a question on PGP.... About how many calculations does it take to crack a 1024 bit key? If someone has limitless time, money, etc., they can break it...but how many calculations does it take? Also, there is a password used to protect the keyrings. Assuming a strong password how many calculations does that take to break? If there isn't some special method, an assumption that leads nowhere, just how much "brute force" effort is really required? Thanks, Dave