36 Hours straight. Admittedly I was on a study drug for this.

I had a mobile application module. The whole thing was marked on a massive project that I hadn't touched... until 36 hours prior to the deadline.

Brought a shed-ton of study/concentration pills from the darkweb, and designed, programmed and deployed in 36 hours (for Android).

... Also got a first in that coursework... mhm..

... And slept for 4 days straight after...

So, listen Kids! Don't do drugs!