Would a site that has over 400 homepage links offer any PR or Seo benefit to any outbound link partners it might have from the lower sections of its homepage? Part of this question also relates to the idea that Google doesnt go past 100 links.
it would still count as a backlink (if the site is not seen as a link farm) but the PR benefit (if any) would be low, especially if the page has low PR also.
The approximate PR passed by a link = 0.85*(PR of the page/number of outgoing links) A page with PR5 and 100 outgoing links will pass 0.85*(5/100) = 0.0425 to each link.
In general terms you get PRx when the total PR passed by all your backlinks is equal to x where x is determined by the above formula.
If there are 5 PR6 pages all linking to my homepage, and each of the linking pages only has 2 outbound links on it, does that mean that the PR of my homepage is > 0.85 (6/2 + 6/2 + 6/2 + 6/2 + 6/2) > 0.85 (15) > 12.75 ? Wow PR12!!
The PR passed by a link on a PR6 page with 2 outbound links will be 0.85*(6/2) = 2.55 Just because this is the PR passed to your page it doesn't really mean that your page will gain 2.55 PR because of this. Also have you ever seen a PR6 page with 2 outbound links?
So even though 5 pages with PR6 are each passing 2.55, I don't get 5 x 2.55 = 12.75? How does it work?
PR12 would be very cool in fact, PR corresponds to an amont of POINTS. A theory which I beleive is the following. PR0 - 1 point PR1 - 8 points PR2 - 8*8 points PR3 - 8*8*8 points PR4 - 8*8*8*8 points PR5 - 8*8*8*8*8 points ........and so on....... So, if a PR5 site has 100 outbound links, each of them would receive (8*8*8*8*8)/100 points!
There is a difference between toolbar PR and actual PR. We can only see the toolbar PR of any site and this is known to range from 0 to 10. The actual PR can easily be higher than 10 as proved in the examples above. Toolbar PR is actually just a logarithmic scale (base 10) and works as follows: Toolbar PR --> Real PageRank 0 --> 0 to 10 1 --> 100 - 1,000 2 --> 1,000 - 10,000 3 --> 10,000 - 100,000 4 and so on... The figures calculated by the formula I posted of PR = 0.85*(PR of page/outbound links) is used to calculate the Real PR rather than the toolbar PR. There has been speculation on whether the toolbar PR is based on a natural log scale or a base 10 scale and only google knows the true answer. See http://en.wikipedia.org/wiki/Pagerank for more information.
I didnt see that equation in the article. The reason I ask this question is I built a website. I placed 1 link to it from a subpage of another site. The subpage was a PR4 and had 4 outbound links on it with almost no content on the page. I am absolutely positive that the site has no other external links to it. According to your equation the PR that gets passed to the new site should be .85*(4/4) = .85 The last PR update gave this new site a home page PR3 from that one link. Is there something I am missing here?
Quote from the google PageRank paper and shown here. The formula I posted is a simplified version with the distribution of every linking site on the internet removed for clarity.
Actually, As I read that, the PR that gets passed to the new site should be (1 - .85) + (.85 * (4/4)) = 1.00 except: 1. what about internal links within the new site? 2. how can you be absolutely certain that there are no other links to the new site? 3. how are you determining the PR of the originating page?
1. Google has all 6 pages of the website indexed. Each of those pages links back to the homepage. 2. A link search through Google, MSN and Yahoo all show the same thing, some internal pages and the 1 link I placed to the site. I have never told anyone else about this website. 3. I am determining the PR of the originating page through the Google toolbar which shows a PR4.