Try the collatz conjecture and anyone who solves this will get 1000 dollor just give me the adress and i will give it is The Collatz conjecture states that the orbit of every number under f eventually reaches 1. And while no one has proved the conjecture, it has been verified for every number less than 268. So if you're looking for a counterexample, you can start around 300 quintillion. try solveingit