[Randy Gardner](https://en.m.wikipedia.org/wiki/Randy_Gardner_sleep_deprivation_experiment) stayed awake for over 11 days, maybe not a world record, but definitely the most well studied case:
>Lt. Cmdr. John J. Ross, who monitored his health, reported serious cognitive and behavioral changes. These included moodiness, problems with concentration and short term memory, paranoia, and hallucinations. On the eleventh day, when he was asked to subtract seven repeatedly, starting with 100, he stopped at 65. When asked why he had stopped, he replied that he had forgotten what he was doing.
[Randy Gardner](https://en.m.wikipedia.org/wiki/Randy_Gardner_sleep_deprivation_experiment) stayed awake for over 11 days, maybe not a world record, but definitely the most well studied case:
>Lt. Cmdr. John J. Ross, who monitored his health, reported serious cognitive and behavioral changes. These included moodiness, problems with concentration and short term memory, paranoia, and hallucinations. On the eleventh day, when he was asked to subtract seven repeatedly, starting with 100, he stopped at 65. When asked why he had stopped, he replied that he had forgotten what he was doing.
[Randy Gardner](https://en.m.wikipedia.org/wiki/Randy_Gardner_sleep_deprivation_experiment) stayed awake for over 11 days, maybe not a world record, but definitely the most well studied case:
>Lt. Cmdr. John J. Ross, who monitored his health, reported serious cognitive and behavioral changes. These included moodiness, problems with concentration and short term memory, paranoia, and hallucinations. On the eleventh day, when he was asked to subtract seven repeatedly, starting with 100, he stopped at 65. When asked why he had stopped, he replied that he had forgotten what he was doing.
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