Post
Topic
Board Bitcoin Discussion
Re: == Bitcoin challenge transaction: ~1000 BTC total bounty to solvers! ==UPDATED==
by
smartpermutations
on 12/04/2025, 07:57:40 UTC
Quick Analysis – Challenge 68

Hi everyone,

We've completed a quick analysis of challenge 68, specifically the hex value bebb3940cd0fc1491. This entry was not found in our database, and we’d like to explain why.

Summary of Findings:
  • The value did not pass one of our pre-processing filters, which is why it wasn’t included in the final dataset.
  • Binary representation of the hex:
    10111011101110110011100101000000110011010000111111000001010010010001
  • It contained 10 unique characters: 0, 1, 3, 4, 9, b, c, d, e, f
  • The sequence bbb appeared 3 times.
  • The binary had more 0s than 1s — with two additional 0s overall.
  • It included two rare patterns:
    • A block of 5 consecutive 0s
    • A block of 6 consecutive 0s
    having two blocks like this was automatically flagged.
  • Another important detail:
    • The input starts with bebb, and the repeated bbb corresponds to binary 1011.
    • This resulted in a strong concentration of 1s on the left, which the filter interpreted as high-weighted leading bits.
    • This further pushed the value below the processing threshold.

Actions Taken:
  • We’ve noted the issue internally and have already sent refunds in credits to everyone who was processing challenge 68 at the moment.
  • You can now select new challenges using those credits.
  • Quick Note: This combination was still marked to be processed, but it was scheduled to run after higher-priority entries.

Thank you for the support until now — let’s go for Challenge 69! 😊
We’re really having a lot of fun with this project and are truly grateful for all your insights and help.
Hope we catch the next one!

Please support our project at https://www.smartpermutations.ch