What's the longest you've gone without sleep?

What's the longest you've gone without sleep (and why)?

The longest I have gone without sleep is 36 hours when I flew to the US!

48 hours. It feels horrible, even tweaking on caffeine won't tickle your dopamine anymore. But the fun thing is that you will start hallucinating and seeing shadow people

I wouldn't recommend doing this to anyone, it's extremely unhealthy and you feel like shit.

Probably about 96 hours. Happened during my teen years, no idea why but genuinely thought I was going to die because of it.