Did you find the key?
I thought you found the key.

64 puzzle found by this command, and modify rotar cuda from 2b to 6m keys search at cpu level (13-6100) uses gpu inside cpu where speed is 6m keys/s
./Rotor -t 4 -m address --coin BTC -r 2 -o newout.txt --range 8000000000000000:ffffffffffffffff 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN