Thanks. I will try to config and use Kangaroo. start with 8000000000000000 (edited). 0.64 bitcoin. not bad to give it a try. lol
You can't use Kangaroo for #64; in order to use Kangaroo you must know the public key; kangaroo only good for puzzles in multiples of 5 where the public keys have been exposed, 120, 125, 130, 135, etc.
For #64, you will have to use a brute force attack using something like BitCrack.