Shakuntala Devi, also known as the human computer, gave the 23rd root of a 201 digit number in 50 seconds. The answer(546,372,891) was verified at the US Bureau of Standards by the UNIVAC 1101 computer, for which a special program had to be written to perform such a large calculation. https://en.m.wikipedia.org/wiki/Shakuntala_Devi#Mental_calculation top that bitches