Profile shinanigans

Hey, what's this now?

I distinctly remember being able to profile-hop back in the old days - 2004/05. If you went to a blogger's profile, you would get a meaningful profile number (most likely reflecting profile's actual numerical order) displayed in the URL. Then you'd simply increase or decrease the number by however much you wanted and you'd get the profile of somebody who registered earlier (if decreased) or later (if increased) than the original profile.

Now the profile number is absolutely outrageous: http://www.blogger.com/profile/12610653062803085900 (from permanentvacation). http://www.blogger.com/profile/03927744738999545249 (from educat). What are you supposed to do with that thing? What does it even mean? How does such a number get produced? Certainly there couldn't have been this many profiles in 2003/2004 when those were created.... Very shady.