Oh hey Barry (west allen ) lol.  Welcome to the jungle club of pointless puzzle hunters.
in the flash, not the fastest tho probably not the brightest too lol

Now I have questions, what hardware do you have? just an old gaming computer i5 4 cores, 16 gb ram and 1060 6gb which surprisingly still run all the games!
What have you learned about elliptic curve cryptography? i know absolutely nothing about it, i always see people here talking about it and doing some math i couldn't get.

Thank you for the tips, I think it's not just a challenge made by one person but a security test from some big entity whom are already deep in bitcoin or willing to go deeper!
Also this challenge made me worried  about my own wallets if some lucky gpu "boi" scanning the whole addresses trying to get lucky.
But then knowing i've been trying to get lucky myself for the past month with just "puzzle" 66 and it's very hard gave me q relief  knowing it's super difficult!

i always get about $200 in electricity bill, the past month using keyhunt and bitcrack every night keeping the computer on the bill came with $400

Question please: I took the unsolved address from a text file in keyhunt i think there's about 80 addresses in there,
and tried to pass them to cubitcrack using -i to read from the file but it always gives me an error, but if the files has just few address cubitcrack works!
any idea how to fix that or work around it?