I bulit new site. Now it has PR = 0. It's enough to be linked from site which has PR 6 to have after next PR update on my new site PR 5 ? or what is the math ?
Its a bit more complicated than this, but I can tell you from my own experience you wont get a 5 from a single pr6 link
youll definitely need many pr6 links and higher to get somewhere like pr5 in the first update from 0.
I am not sure what the exact formula, (algorithm), is for a PR but you definitely need more than one. Furthermore if that PR6 has many links then you will need even more. As an example, I got a PR4 from a PR7 link, (and a few other PR1 and PR2). FFMG
You "can" get a pr5 from a pr6 if theirs only 1 or two outgoing links on that page, but since this is rarely the case it will take probably 3 or 4 pr6 links to get a pr5 if they all have a dozen or so outbounds.
so is it good to have many links from pr2-pr3 etc. sites than to have a couple links from pr6+ sites?
In my view yes. I made a new site and also linked it with a number of PR2,3,4 sites. Within a Week iam expecting a PR3 with the Future PR tools for this site.
Pls check these calculations: Google Page Rank Calculations The value of how many points that migrate to the recipient page is based on the originating page's points divided by the number of outgoing links on that page. PR goes something like this;- PR0 = 1 page point, PR1 = 8 page points, PR2 = 64 page points, PR3 = 512 page points, PR4 = 4096 page points, PR5 = 32768 page points PR6 = 262144 page points, PR7 = 2,097,152 page points, PR8 = 16,777,216 page points, PR9 = 134,217,728 page points. The above is just a estimate or rough idea for calculation of PR points If you take a link from PR4 and the page has 100 links you will get 4096/100=40.96 points. Let me know your views on this. Thanks
I believe the forumula is something like this "PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))". You can find more about that here http://www.webworkshop.net/pagerank.html Good luck figuring it all out.
I would prefer fewer links from high PR sites. These actually have a better chance of representing quality.
Really... So what if one of my sites always says "unknown"? Any tool I use I always has the same result.
In my view Unknown Means that u don't have enough backlinks to expect some PR. Try to get some good Backlinks and see the Effect. Iam sure u will see some PR after that