selomelo - 10:10 pm on Feb 11, 2006 (gmt 0)

We already know that toolbar PR is in fact an historical figure. When you query google for current PR, you get some mysterious figures such as:

Rank_1:1:6 Rank_1:1:5 Rank_1:1:4 Rank_1:1:4 Rank_1:1:5 Rank_1:1:6 Rank_1:1:5 Rank_1:1:0 Rank_1:1:1 Rank_1:1:5 Rank_1:1:2 Rank_1:1:3 Rank_1:1:0 Rank_1:1:0 Rank_1:1:3

These figures are for a site that has a current toolbar of PR4.

I searched the web for an explanation, but failed to get a good one.

Is there any idea as to what all these magical numbers mean?