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You might want to check the date of the post

You don't have to check the calendar for this topic at all. Almost every day feels like April Fools' Day.

I wonder how the 67 was solved. Was it someone very lucky or with access to insane computing power.

Maybe some kind of botnet cracking keys...

At least I know that if you have the correct base key for the right bit flip, Mutagen is proven to work—from Puzzle 66 to Puzzle 128. But you have to guess exactly which one it is. Grin

Here is a version with better speed)

https://github.com/MikeWazovksy/Mutagen

=======================================
== Mutagen Puzzle Solver by Denevron ==
=======================================
Starting puzzle: 30 (30-bit)
Target HASH160: d39c470466...c257d68a08
Base Key: 0x17E2551E
Flip count: 16
Total Flips: 145422675
Using: 8 threads

Progress: 81.659364%
Processed: 120061952
Speed: 11.36 Mkeys/s
Elapsed Time: 00:00:10

=======================================
========= SEARCH COMPLETED ===========
=======================================
No solution found.
Checked 147324928 combinations
Total possible: 145422675
Completion: 101.308086% Huh

Time: 13.55 seconds (00:00:13)
Speed: 10.87 Mkeys/s

I'll fix it now, I tested it and it found everything)