Title: I prefer PI Speaker: Prof. Wadim Zudilin, Radbound University, The Netherlands. Date and Time: February 4, 2020; 11:00 a.m. Location: RISC, Castle of Hagenberg. Abstract: I will report on my joint work with Doron Zeilberger, about how one can use experimental mathematics and symbolic algebra to measure the irrationality of famous mathematical constants; in particular, about a new world record for PI. There is still some room for a human touch, and this involves some classical number theory (like "Freshman's Dream Identity") and combinatorics of binomial sums. My talk will outline the story behind the scenes.