My personal longest? I woke up one morning at around 6 AM getting ready for college and finally conked out nine days later at around 5 PM.
If you were to count that in hours... that's about 227 hours right there, give or take about a half-hour. It was all in preparation for a 24-hour gaming tournament... but after the third day of perpetual practice and intentionally-induced insomnia, I couldn't bring myself to fall asleep. I tried sleeping pills, NyQuil, blunt trauma force to the head, but nothing worked. Finally, as soon as I got home on that last day, I collapsed onto the couch in my basement and slept for what was apparently two-and-a-half days.
And if you're wondering, I did win the tournament. I still wonder if it was worth it, though...