First , I didn't say you can search all 64 bit range in one week.if you go back to my topic you can see it.. I said search random keys.
Secondly, you have to be smart enough to understand how your enemy play games.
The keys you said they have found.. they were easy keys.
To attract people like you..the other keys that are found like puzzle 65...they found...do you know what I mean 'they'
I mean the group who made this puzzle.
So in your mind you think one can search random keys, for 1 week, and should be able to find the key?! Random keys will be slower than sequential keys, and you could could search the same key multiple times. With doing a random search, you might get lucky within the first minute or it may take you 1 million years; there is no guarantee or any math that says you should be able to find the key within a week.
Wow, so there were many people who made this puzzle?! Lol...you have no idea what you are saying. 65 was found because every 5th key has the public key exposed so search time is reduced using BSGS or Kangaroo, i.e. they are not being found via brute force/random searches.