lol yeah. it's just a little above 1 / 2**70 for every time you do a H160 and check for a match.

"A little above" meaning insignificantly close to 1, since there's the additional (almost zero) chance that, besides the creator's private key, there might be other keys hashing to the same address. We can't know that, but if does affect the chances (as minimal as it does).

It's also 100% if you ultimately intend to scan all 2**70 keys (assuming the creator isn't trolling).