Google PR update

[Sonya666]

How often does Google Update PR?

1) How often does Google Update PR?
1a) Is it the same for all websites or not?
1b) If not, what matters? What are the factors influencing on that?

[jagan]

Hi,

Google updates its PR after 4 to 6 months and PR update depends on many factors like Backward Links, Page Contents and the Age of the Web Site.............