Killed himself by eating a poisoned apple (probably after watching Disney’s Snow White). His sentence in his homosexual conviction was to be given estrogen, until his breasts grew.
As a professional mathematician he
(1) Proved that any problem that could be solved by mathematics could be solved by a machine that could read, write, and perform logical operations AND, OR, and NOT.
(2) Helped break German ENIGMA codes (British “ULTRA”).
(3) Worked on first British computer COLOSSUS” which used mercury delay lines as memory.
(4) Worked on modern semi-digital telephone encryption devices.
The simple logic circuits to perform the logical operations AND, OR, and NOT were first conceptualized and realized by Nikola Tesla. He used them in his radio remote controlled boat that was demonstrated in NYC in the late 19th century.
Patents for the basic logic circuits were later denied based on prior art by Tesla. The creation of radio was also ascribed to Tesla by a court judging patent claims.
Tesla was a brilliant crackpot.
It was the Poles who helped break ENIGMA.