Origin of proof of irrationality of square root of two What is the first known accepted proof of the irrationality of the square root of two or the n root of any prime preferably one that is attributed to someone? 

Greg, I saw at that site that a poor demented soul named Ronald Watkins calculated it to 10 trillion digits in June 2016... Using 8 digits per inch: 10,000,000,000 / (5280*12*8 ) = 19728.535353.... So the resulting number would be close to 20,000 miles long:eek: 

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