None that I'm aware. I literally just came upon this as I was trying to help someone recover their own keys. I'm guessing maybe Bitcoin won and they gave up.

The last update on github was June of 2020. Any more recent updates?

siggy47

From the author:
> 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: https://blockchain.info/tx/08389f34c98c606322740c0be6a7125d9860bb8d5cb182c02f98461e5fa6cd15

There's also some good discussion here:
https://bitcointalk.org/index.php?topic=4453897.msg39845999#msg39845999
