Do a little more research on Stanley Tennenbaum. This discovery happened around the 1950s. Tennenbaum didn't drop out of mathematics so much as he dropped out

Do a little more research on Stanley Tennenbaum. This discovery happened around the 1950s. Tennenbaum didn't drop out of mathematics so much as he dropped out of institutional mathematics. More here, including a post from one of his children in the comments: http://divisbyzero.com/2009/10/06/tennenbaums-proof-of-the-irrationality-of-the-square-root-of-2/ http://divisbyzero.com/2009/10/06/tennenbaums-proof-of-the-i... Stanley's up in heaven now.