Originally Posted by Curtis2011
The page rank is basically a calculation of how likely a random person browsing the internet will end up on the website or web page that holds the ranking.
Since Google.com is the most-visited website in the world, it makes sense that they would have a higher score than anyone else.
One way backlinks from reasonable quality sites.
PR5 ~100,000 - 150,000 backlinks from my personal experience. Nothing to do with traffic or content.