Many years ago, seems like it was like a day and a half, I'd been rather ill. The guy I shared the apartment with acted rather surprised when I came out of my room. He said that he didn't think I was even home.

I think it was 15 or 16 hours after barely sleeping for two nights due to traveling. I sleep damn well. I could do 11 hours straight on a regular night if I let myself.

about 16 hours

Probably about 16 hours or so.

I think about 15 hours. I cannot sleep on planes. I have traveled for more than two days straight before, from 12 hour plane rides, to layovers, to six hour connecting flights, to another lay over, to another few hours on the plane. I can be practically high from exhaustion, and I just cannot fall asleep on a plane for the life of me. So after travelling like that, I just pass out for the better part of a full day.

I believe that I slept for about 14 hours straight after I had my wisdom teeth removed. It was a good distraction from the pain.

I cycle between insomnia and hypersomnia so I do have periods where I sleep 12+ hours every night. I don't remember the longest I have ever slept but it's probably close to 16 hours.

Somewhere in the neighborhood of 20 hours, back when I was in high school. Deep depression combined with utter exhaustion can do that to you.

About 24 hours.