Most humorous comments are downvoted into oblivion, but occasionally something humorous will strike a chord with the mob and it'll get upvotes. But if there's a pattern regarding what gets a favourable response, versus what doesn't, I've never been able to identify it.

Humour is fine in principle, but good comments should attempt to further the discourse - e.g. expanding explanations, adding related information, explaining opposing viewpoints, making constructive criticism, fact-checking, or asking questions.

For example, it's very unclear to me what your original comment has to do with trying to prove the Riemann hypothesis. Assuming there is a link, adding an explanation might have improved its reception.

I'm taking screen shots just FYI.