Eh, back in the day (In like 8th grade during the Summer) me and my best friend at the time tried to see how long we could stay awake for. We didn't even last 40 hours before we passed out for like 15..

During Finals week, if I have a break in days before tests, I will not sleep. Lots of coffee, slerpees, etc. to stay awake, but I've stayed up a little over 2 days during those times. No more than 55 hours or so though.