*Originally Posted by ***Kevin H**

Having agreed with DZine in his comments - assuming you are interested from a pure 'interest' point of view then:

the PR situation is more complex that your assumption above and I won't even try to do the full math but it works closer to this:

the 'value' of PR is not linear - and whilst I don't know the exact numbers, for this example, we will use exponential of 10.

So, PR0 = 1, PR 1 = 10, PR 2 = 100, PR 3 = 1000 etc

the amount of 'value' available to passed out of a page is its base value * 0.85 (so 85 for PR 2, 850 for PR 3 etc)

You then divide this number by the total number of links (internal or external, followed or nofollowed)

so, if there is a PR 2 page with 1 link on it then all 85 'value' would be passed through the link.

If that same page has 85 links on it then each link would get 1 'value' passed through it.

Very quickly you can see that the more links on a page the faster the 'value' passed through any link decreases.

(You can also see why it is easier to go from PR0 to 1, and 1 to 2 than it is to go from 2 to 3 etc.)

We can then reasonably expect that nowadays once you have the 'link value' for a given link this is then going to be modified even further by page relevancy etc (no idea on how this works though).

So, when you consider that most pages have lots of internal links (menus etc) and 'scam' sites and directories have 10s, 100s, even 1000s of links on, then the value you will ever get from the link is minimal at best; even from sites with supposed 'good PR'.

This is why those in the know keep saying not to worry too much about the PR of a page you want a link from, but to concentrate on the quality of the page and how likely you are to get traffic FROM THE LINK. This is much more important.

So going by your maths above, it should be assumed that link juice passing from a page with dofollow tag to my site would be prized with some value of PR whether the PR be 1 or 5 for the page I am linking ( Obviously the value would be high or less according to the page PR).
agreesagrees : Although SEOer dont worry about PR, but customer worldwide still finds faith on it.agrees