maybe someone will do it on a GPU, and someone will run it on 10-20 cards

20 GPUs could reach ~40,000 Mkeys/s

I noticed something, let's say if the speed is 75 million per second, then in theory we should go through 50 billion in 15 minutes, but now it takes more time)
maybe someone will do it on a GPU, and someone will run it on 10-20 cards

20 GPUs could reach ~40,000 Mkeys/s

First, let’s agree on whether it takes 34, 35, 36, or 37 flips.

Number of mutation options for 68 bit of 34: 28453041475240576740
Number of mutation options for 68 bit of 35: 27640097433090845976
Number of mutation options for 68 bit of 36: 25336755980333275478
Number of mutation options for 68 bit of 37: 21912870037044995008
Then you need to correct the script so that it doesn't calculate for Flip count: 34