Ask HN: Cool Things You've Done (Brag Thread)
I don't normally mention this stuff, but since you asked...* I started at university when I was 13.* I won the Putnam Competition.* I hold a world record for computing Pi.* My bsdiff binary patching tool is used on tens of millions of computers and has saved several hundred human-years of waiting for software updates to download.* I found a security bug in an Intel CPU.  (Osvik/Shamir/Tromer also found it, but I was first, by a few weeks.)* I'm the Concertmaster of an amateur symphony orchestra which is performing the Verdi Requiem tomorrow.