In my view
1000 gpu for 7 days enough to find 71 puzzle,
You always calc full range search, maybe that's wrong
7days with 1000 gpu with logic search could be resulted
Give me 1000 gpu access, hope I could find earlier
Enlighten us on the "logic search" that trims down the time by a factor of 285x while guaranteeing the key isn't found inside one of the other skipped 284 alternatives. And why do you need 7 days, and not just one, I'm sure there are 7000 available GPUs right at this moment, waiting for your logical search.