The record for the longest period without sleep is 11 days.
The longest time a human being has gone without sleep is 11 days and 25 minutes. The world record was set by American 17-year-old Randy Gardner in 1963.
Although it’s unclear exactly how long humans can survive without sleep, it isn’t long before the effects of sleep deprivation start to show. After only three or four nights without sleep, you can start to hallucinate.