Remember that girl in your high school math class who would always get extra credit by memorizing more digits of Pi? Well, if you ever hear her utter "9484283852," well, you've probably already finished your college applications (and maybe even earn a degree or two). That ten-digit string is the lead-up to the 5 trillionth
number, reportedly a new world record calculated using special software from Alexander Yee (y-cruncher) and a pretty awesome custom-built rig by Japanese Pi-pusher Shigeru Kondo -- a pair of 3.33GHz Intel Xeon X5680, 96GB DDR3 RAM, about 39TB of storage, and Windows Server 2008. All in all, the computation and verification took about 90 days to accomplish. Full, fascinating details at the source link.