User blog comment:Kyodaisuu/Pseudo Rayo's number/@comment-180.214.233.13-20141219171143/@comment-1605058-20141219173516

Confusion has nothing to do with well-definedness. If you were a programming expert, and I gave you a C program which, apparently, makes absolutely no sense, does it mean that it's impossible for it to give out a numerical value, or does it just say that you don't understand the program yourself? No expert, even the best one, can understand everything about his field of research.

Also, largest Heegner number isn't "very clearly" 163. You say so only because you have heard about this theorem which classifies all Heegner numbers, and I'd risk guessing you have no idea how the proof itself works.