Mathematicians have been hunting for odd perfect numbers for over 2,000 years with the same success rate as my dating life - absolutely zero.
For the uninitiated, a perfect number is one where all its divisors (except itself) sum up to the number itself. Like 6 = 1+2+3. We've found exactly 51 perfect numbers so far, and they're ALL even. The odd perfect number question is basically math's version of Bigfoot - everyone's got theories, nobody's got proof.
That confident Bugs Bunny "no" is every mathematician's secret answer when asked if odd perfect numbers exist, despite the fact we can't actually prove it. It's the mathematical equivalent of saying "trust me bro" on a research paper.