the naming convention that allows it to be named cuckoo729. the program could be rewritten not to use bit 31 as a flag, and then you could use as many as 2^32-

the naming convention that allows it to be named cuckoo729. the program could be rewritten not to use bit 31 as a flag, and then you could use as many as 2^32-1 nodes, but that's not neatly expressible as MULT*2^SHIFT with few digits.