Hi! How to check how much bit long keyspace?
It's all on the main post my friend! Double check it if you have any doubts!!!
Sorry i can't find any information on how to calculate the private key bit range space from any bitcoin address.
That's pretty unknowable, far as I'm aware. Just gotta try and try again. Pick an number and let it run. Wait til it either fails or you run out of patience. Rinse. Repeat. (that is if you're looking to recover your old wallet, doncha know).
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On another note, I think I figured out how to set a range instead of just using a number for -bits. Haven't let an extensive test run yet but worth an experiment. Say you want to use the privkeys from 63 and 65 as your U and L instead of -bits 64.
./vs-kangaroo-hybrid -v 1 -gpu -p 8 -bits 0000000000000000000000000000000000000000000000007CCE5EFDACCF6808:000000000000000000000000000000000000000000000001A838B13505B26867 02pubkeygoeshere000
I'm not at all sure if it will work with a wider range (say for instance 000000000000000000000000000000000000000000000001A838B13505B26867:0000000000000000000000000000000000000000000000349B84B6431A6C4EF1 which is 65 and 70). Might be able to test this using some of the already solved values (like plug in L of 48 and U of 53 and look for 51's key). If I'm wrong and this is silly, please let me know, sir Alek. I'm by no means a math or programming guy, just a tinkerer.
Also, using rekey DOES seem to work based on an overnight test. Changes T and W start points after whatever you set the interval to. -r=5000 rolls em after 5Gj.