And you thought I was a geek for knowing 75 digits of pi.
Peter Thamm of Melbourne’s Viewbank Secondary College has memorised ten thousand digits. (There’s video available of some of it.)
I suppose these days, people have spare number-remembering capacity in their brains, since virtually everyone has a phone (home or mobile) that stores numbers, so nobody needs to memorise anybody’s phone number anymore. Peter’s obviously found a use for that spare capacity.