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inbound - 12:23 pm on Jul 5, 2006 (gmt 0)

As a rough guide (assumuing there is an exponential factor of 10 between PR levels) you can say that PR levels need a certain amount of PR 'points' passed to them from other pages:

PR1 needs 1 'points'
PR2 needs 10 'points'
PR3 needs 100 'points'
PR4 needs 1000 'points'
PR5 needs 10000 'points'

9The exponential nature of PR explains why getting to PR 9 and 10 is so tricky)

PR 'points'given out by a page, again this is a simple example, can be roughly calculated by dividing the above values by the number of outbound links.

e.g. a PR3 with 20 links gives 5 'points' to each page, this would move a page with no other inbound links to a PR1

Assuming that the pages that you get links from have an average of 20 links you would need 20,000 links from PR2 sites to get to a PR5. Likewise 2,000 links from PR3 sites would be required.

The good news is that you would only need 2 such links from PR6 sites to make it to PR5.

There are many more factors to consider such as dampening, the actual PR of a page can be PR?.0 to?.99 and make links worth different amounts from what appears to be thesame PR value etc.

I hope that helps