I remember programming my old Amstrad computer back in the early eighties to work out the birthday probabilities for all numbers from 2 to 367 (obviously if you have 367 people at least two of them MUST share the same birthday, whereas with 366 it is theoretically possible they could all have different birthdays. What was interesting was that at 80 people the computer returned the probability as certainty. Of course it was a Z-80 processor, maybe my Pentium would go much further, except you can't program these damned things, nowadays, it was much more fun back with the Apple 48k and the Sinclairs .........

Murray