# Thread: Proof of square root of two irrationality origin

1. ## Proof of square root of two irrationality origin

What is the earliest 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?

2. ## Re: Proof of square root of two irrationality origin

According to this website- http://www.mathsisfun.com/numbers/eu...rrational.html the standard proof of the irrationality of the square root of 2 goes back to Euclid.