Nice, it's a problem of finding integer points on an elliptic curve. On Wed, Feb 8, 2012 at 2:51 PM, Dan Asimov <dasimov@earthlink.net> wrote:
According to what I've read, Fermat posed this problem to Mersenne in 1943. This puzzle is intended for people who haven't seen the solution already:
Find a primitive Pythagorean triple a^2 + b^2 = c^2 such that both a+b and c are each square numbers.
(Please e-mail your answers straight to me so they don't keep others from solving this.)
--Dan
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