If we all share each scanned section together, there will be more than prefix theory or the number φ.
I'm scanning with a GPU using BitCrack at a speed of 550 million keys per second. I searched the key range from 78D110000000000000 to 78D12BDB2A82C14000 over a period of six months.
What makes you to scan this range and stick to it for 6 months? Do you think it starts with 78D1?
I highly recommended you to stop BitCrack and use KeyHunt-Cuda or VanitySearch-BitCrack, it will double your speed.
A rough aggregate of all puzzles keys from 1-70
'D' appears only 2 times at position 3 and '1' appears only 2 times at position 4
https://i.postimg.cc/TPXMYLfz/Capture.png