[gilded-lilly]

If you watched one per second, you would need to watch for 235 quintillion years before seeing them all, and 3.5 million years before seeing the same one twice.

[glimshe]

If I decided that doing it was a good use of my time, would it be guaranteed that after said period I'd actually watch them all?

[bryanrasmussen]

depends how randomness is implemented