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Used to have a serious insomnia problem, I was up a full 3 days once.

3 days because of reasons beyond my control. Was surprisingly lucid during all of it, though.

3+ myself. That's how my favorite Dunkin Donuts got to know me by name. :P

3 days cause jet lag swag

I think about 70 hours. The first day I didn't care to sleep and the second day I couldn't, I think I was too busy doing schoolwork. I was surprisingly fine through most of it, but the last couple of hours were hell. I didn't notice any hallucinations, but I'm sure I had some, dreams and reality are pretty indistinguishable for me.

I was pretty used to staying awake for 36+ hours and until the last few hours the experience was pretty much the same.

While serving we used to do sleep deprivation exercises that stuff was brutal we would do things like fitness tests and map reading and simple problem solving ect and then be kept awake and carry out the same tasks at different tiredness states after about 72 hour at night you start seeing things and tripping out.

All in the name of combat readiness... now drinking for 3 days straight that was way more fun.

Around 65 hours when I was 13 or 14. I've always had trouble keeping up a "normal" sleep pattern ever since I was 10, plus occasional bursts of insomnia in the last few years (which is why I'm up at 5 am right now >.<).
Nowadays I rarely stay up past 35 hours - I do that sometimes when I have a work deadline or to get my sleep schedule back on track, but the older I get, the more difficult it is to recover from being awake that long.

The longest I did was a full 48 hours. I used to be a tile setter so we were doing a Walmart in Alabama, got it finished only to be told some of the painters had taken their equipment and broke an entire line of tile down another store we had to go fix. I taking in energy drink after energy drink :D

I've had really really bad insomnia for almost two decades now. My record is five days.

I don't drink coffee or energy drinks and get bored really easily if I'm not doing anything, so I'd guess my time is around 30 hours. It happens real often though since I tend to forget time when working on courseworks or playing games. If I've ever done more than that then I don't remember. :D

3 or so days, was in a lot of pain and just could not get comfy enough to fall asleep. Not exactly sure when I fell asleep, but when I went out I was in a very deep sleep.

'Bout 50 hours for a college mechanical engineering assignment. 1 pot of coffee in 20 minutes.

Paranoia setting in after 1.5 days - not competitive :E

over 60hs, can't remember exactly. i lost consciousness after reaching that mark.

View attached image.

Back in my "not so nice person" days, stayed awake almost a week once (under the influence of some "not so legal" substances.)

Since I quit using, probably 3-1/2 or 4 days.

I've suffered from insomnia since I was a small child so I only sleep 2-3 hours a day anyway, so 2 days awake in a row isn't at all unusual for me. Three days is pushing it anymore, though. I at least need a short nap in there. I took medication for it when I was younger (forced by my parents), but since I stopped using drugs - and sleeping meds are highly addictive - I'd rather go without sleep.

I voted 48 hours, but it was more like 53. What's more interesting is that I slept for 25 hours straight afterwards, without even going to the restroom.

For me it'd be something like 36-42h. That is, skipping an entire night of sleep (finishing a difficult assignment or similar) then heading to bed at mostly normal time the following night. I can't even imagine staying awake longer than that, as already I felt like my thinking capacity had dropped to 50% or more below normal (not conducive for doing more assignments!).

I can survive on very little sleep a few nights in a row but I guess that's entirely different and probably normal.

Longest in recent memory was almost 48 hours, less than a week ago.

During my first time in Afghanistan, my unit were under fire. It was not heavy and we didn't lost someone that day, but the adrenaline kept me awake for merely 48h.

72 hours, maybe more.

I had a remote boss who was really demanding and JUST HAD TO HAVE THAT FEATURE FINISHED BEFORE SAID DATE. Good thing our food was free for all those days and we could relax and take a break when we needed to.

The tasks would have probably finished earlier if not for our manager who kept on insisting for one....more.... well, game. (DOTA) you know, JUST ONE MORE!

Fun fact: I learned how to play DOTA at work, after college, from my superiors and managers who forced me to learn it. They made sure i was feeling left out if i wasn't playing with them. Friggin basterds.Now i think I'm just as addicted as they are. (Or not, maybe)

Weirdest thing: after this and we delivered everything, i just slept for 10 minutes. No kidding, just 10 minutes and i felt like i slept for a full night. I was super refreshed and then i could go on again that same morning i woke up for the whole day.

I think about 40ish hours - it happened not once during my studies (but probably won't happen in next semesters) that I completely didn't sleep a night, usually due studying/stressing about I should study but I can't. Last happened a few weeks ago when I simply couldn't sleep because how terrified I was because of some tests (Yes, I know this is not normal/heatlhy :)
Most often I just have terrible sleep instead of no sleep - go to bed at 3 am because of triying to study, fails to learn anything because sleepiness and stress, then takes 1 hour to get to sleep because I'm stressed out that it's so late and I still don't know anything, then have 2-4hours of shitty sleep, waking up every half hour covered in sweat and takes 10-15 minutes to sleep back. Stress management problems and adhd is such a great combination :\

About 50+ hours during uni. I still stay awake for 30+ hours from time to time to correct my sleeping regime if it gets messed up.

almost 4 days once when I was at uni. I went to be on the monday night after and woke up on wednesday although I was seen going to the bathroom on the tuesday I had/have no memory of the day at all. It threw me a bit for the next few days/