while in prison, I'd write out (or type out on an excel spreadsheet while on a break at work) as many countried as I could think of in my head. on a good day I could get about 170, a bad day I'd get 155 and be brain-dead on the rest. I'd tell guys I'd give them $10 if they could write out 50. NOBODY in 5yrs ever did... of course there were a few of my white-collar buddies who could do it, but I sure as fuck wasn't gonna give them $10. lol
I believe there's something like 188+ countries, but I could never get past that 169/171 mark.