ultrafacts: In 1977, at Southern Methodist University, she was asked to give the 23rd root of a 201-digit number; she answered in 50 seconds.  Her answer 546,372,891 was confirmed by calculations done at the US Bureau of Standards by the UNIVAC 1101

ultrafacts: In 1977, at Southern Methodist University, she was asked to give the 23rd root of a 201-digit number; she answered in 50 seconds.  Her answer 546,372,891 was confirmed by calculations done at the US Bureau of Standards by the UNIVAC 1101

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from: https://jz73.tumblr.com/post/110115455176