vitomelon
BANNED
- Jan 2, 2010
- 125
- 111
Hi all,
I found a lot of people on here trying to figure out what exactly the big G's algorithm for calculating PR is. Like most of the stuff that Goog does, I thought it was random. I decided to do some digging and found the exact equation that they use.
Source:
http://infolab.stanford.edu/~backrub/google.html
I'm sure some of you enterprising blackhatters will now advertising PR boosting services...
I found a lot of people on here trying to figure out what exactly the big G's algorithm for calculating PR is. Like most of the stuff that Goog does, I thought it was random. I decided to do some digging and found the exact equation that they use.
Code:
We assume page A has pages T1...Tn which point to it (i.e., are citations). The parameter d is a damping factor which can be set between 0 and 1. We usually set d to 0.85. There are more details about d in the next section. Also C(A) is defined as the number of links going out of page A. The PageRank of a page A is given as follows:
PR(A) = (1-d) + d (PR(T1)/C(T1) + ... + PR(Tn)/C(Tn))
Note that the PageRanks form a probability distribution over web pages, so the sum of all web pages' PageRanks will be one.Source:
http://infolab.stanford.edu/~backrub/google.html
I'm sure some of you enterprising blackhatters will now advertising PR boosting services...
