zlacker

>>tromp+(OP)
TFA neglected to mention that floats have an "infinity" value, quite a bit larger than any 64 bit busy-beaver.

(And before anyone says it's not a number, call `isnan` with an infinity and get back to me :)

>>repsil+rq
I don't believe IEEE 754 specifies which infinities it encodes as its positive and negative infinity. I'd tend to treat it as the surreal equivalence class {0,1,2…|}, but it might be any of the others.