yes go to github
https://github.com/iceland2k14/quick download quick or just pubdiv.py instructions on page are very clear how to.
so to reduce 2 you need to generate 2 power 2, 4 keyspaces 2 power 4 etc
Power Value
0 1
1 2
...
50 1,125,899,906,842,624
Going back to this... So you drop it 50 bit... Get your insane number of public keys. Theoretically if you then Kangaroo it and get the private key in the range of 75...What's the following process?
Firstly it would take at least a year and a very large hard drive to generate that many keys. but if you did and somehow found the key on 75 then you convert that key to decimal and multiply this by 1,125,899,906,842,624 and convert back to hex for the 125 key.