Alexander J. Yee, who answered the question is a student who calculated Pi to 5 trillion digits: http://www.geekosystem.com/pi-five-trillion-digits-alexander-y

Alexander J. Yee, who answered the question is a student who calculated Pi to 5 trillion digits: http://www.geekosystem.com/pi-five-trillion-digits-alexander-yee-shigeru-kondo/ http://www.geekosystem.com/pi-five-trillion-digits-alexander... The main challenge for a computation of such a size, is that both software and hardware are pushed beyond their limits. For such a long computation and with so much hardware, failure is not just a probability. It is a given.