I wonder what one Believer would do if they stumble upon a 68-bit (or longer) prefix, or whatever has a less than 1 in 2**68 chances of being observed relative to their probability "rules".
Queue up the whole range as the next best option, to find the next 68+ key, or...? Maybe skip it? =))

PS: I forgot, this definitely can't happen. Sorry guys, my bad.