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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...

=======================================
== Mutagen Puzzle Solver by Denevron ==
=======================================
Starting puzzle: 66 (66-bit)
Target HASH160: 20d45a6a76...94335db8a5
Base Key: 0x2A32ED54F2B4E35EE
Flip count: 6 (override, default was 35)
Total Flips: 90858768
Using: 12 threads
Progress: 11.006092%
Processed: 10000000
Speed: 33.49 Mkeys/s
Elapsed Time: 00:00:02
=======================================
=========== SOLUTION FOUND ============
=======================================
Private key: 0x2832ED74F2B5E35EE
Checked 19165236 combinations
Bit flips: 6
Time: 4.68 seconds (00:00:04)
Speed: 20.20 Mkeys/s
Solution saved to puzzle_66_solution.txt

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

Code:

=======================================
== Mutagen Puzzle Solver by Denevron ==
=======================================
Starting puzzle: 68 (68-bit)
Target HASH160: e0b8a2baee...7451fc8cfc
Base Key: 0x730FC235C1942C1AE
Flip count: 10 (override, default was 34)
Total Flips: 290752384208
Using: 26 threads
Progress: 99.922523%
Processed: 290527117312
Speed: 97.11 Mkeys/ss
Elapsed Time: 00:49:51

=======================================
========= SEARCH COMPLETED ===========
=======================================
No solution found.
Checked 290759114752 combinations
Total possible: 290752384208
Completion: 100.002315%
Time: 2994.03 seconds (00:49:54)
Speed: 97.11 Mkeys/s