Hi The table below illustrates the approximate dependence of your page's PR on the PR and quantity of pages that have links to it, and equivalence of a different number of pages with different PR. We assume not more than 10 external links on each page For example, to get PR of 7 you need at least 3 links from PR 8 or half a thousand links from PR 5. With correct relinking (the correct system of links to internal pages and main page within a site) you can get the results you need much faster. Don't forget that PR from the pages that link to yours is a coefficient, which indirectly affects the site's rank for a search engine. Just as much and even more than by PR your site is affected by text of the links (anchor), number of external links on linked pages, while the content of your pages doesn't carry that much weight. To get into the top 10 on complex requests you need to take into consideration all these (and some others, such as the site's age) factors. (courtesy: www.TNX.Net)
I am doubted on "For example, to get PR of 7 you need at least 3 links from PR 8 or half a thousand links from PR 5." make simple search on Google u will understand that u r wrong
It's correct but not accurate, it can be off a little. No one has the true formula of google. What it's correct about is the region of amount of PR links you need. One site I have has around 22,000 links, random ones, with ranges of PR, but mostly PR0 or PR1, and the website main page as a PR of 5, so it's pretty close.
What if the page your link is placed on contains a dozen other links? I rather doubt you will have as much PR transfered as you would have from a page your links is the only one on.
Cool guide, I doubt its 100% accurate but still good. You can atleast have something to work off to get a rough estimate of your PR And also, Seeing as Tnx posted that, There is a chance its HIGHLY accurate seeing as they are a link building service, they could have setup mutliple tests over the past months just to make this graph