There's a $1,000,000 USD reward for being able to solve (that is, prove) the Riemann hypothesis. XD The problem is that no one can do that, since no one knows how to prove Riemann's number. After all, assuming I haven't forgotten (last time I looked at that was in like 4th or 5th grade) the Riemann hypothesis finds a pattern for the distance between prime numbers for infinity, using a special variable (Riemann's number) to be the distance between numbers. Except, it's always changing and no one can test it for all of infinity, so no one has proven it yet. And boba milk tea is delicious.