Even funnier that it wouldn't even be the first time that happens: https://en.wikipedia.org/wiki/Grigori_Perelman
And he also gave up his trophy, which is displayed in a random corridor of a random math museum in Paris, where visitors pass by without looking, lacking most, if not all, of the context. Only because I knew the story and the man did I recognize the object for what it was.
It's very likely that no one will claim any of the cash prizes, which is funny to me