How many URLs do people who memorise lots of URLs memorize?

[jamesforsyth]

[I was deliberately inconsistent with the title of this post, so that it could be found in more searches.]

Hi, I was wondering how many URLs a person can/does remember should they have a tendency for that sort of thing.

I'm not really thinking about the average person, because the number of URLs memorised by them would most likely be relatively few.

And, if so, which websites (of generic interest, of course) would be useful to memorise?

Any further tips?

Thanks in advance for my curly/weird question.