I've been working on a tool for brute-forcing Bitcoin private keys. The main purpose of this tool is to contribute to the effort of solving the Bitcoin puzzle transactions:
that's the main group effort for this btc puzzle, however the program is closed-source (cmiiw) 
OP is trying to do the same effort, but without collective efforts this will be redundant
The Bitcoin puzzle transactions were setup as an exercise to see how tough it is bruteforce BTC... and is essentially what the LBC is attempting to cash in on (aside from other "collateral damage" of people with weak keys).
What is interesting is that the addresses in the middle range of amounts (0.056 to 0.16 BTC), which were theoretically "easier" than the addresses with the larger amounts, have not yet been "cracked"??!?
I think the higher amounts that already spent was not 'cracked' but moved by the creator What is interesting is that the addresses in the middle range of amounts (0.056 to 0.16 BTC), which were theoretically "easier" than the addresses with the larger amounts, have not yet been "cracked"??!?
and I just noticed 1LzhS3k3e9Ub8i2W1V8xQFdB8n2MYCHPCa has just been found recently! on May 29th
However LBC site still show the task for finding its key
Did someone else find it? or was LBC site just slow on updating its stats page?
Quote from: https://lbc.cryptoguru.org/stats
Time to hit #55 of the puzzle transaction (1LzhS3k3e9Ub8i2W1V8xQFdB8n2MYCHPCa) 0 to 112 days at current speed in sub-55bit search space.