Oops, I misunderstood what an uncomputable is... In that case, I would say Infinity-Infinity. This time, it's truly not a number.
Advice for non-German speakers : don't look for a translation of "Pullermann". I did it, and now I regret it.
I love this meme. Not only because it's a good way to practice German, it's also an actually funny thing.
I would have to dig until I find what remains of my defunct dog...