Note:
These findings might not be significant for others, but for me it is hard work and research of finding Bitcoins since 5 years.
Congrats! With this kind of intelligent filtering, you’ll keep searching for the next century.
At least you’ll never run out of empty keyspace to explore. But hey, persistence is its own reward, right? Good luck seriously, you’ll need it!


How about modifying BitCrack Kernel to filter private keys (using my findings or custom filters like no consecutive 5 zeroes in private keys) before address generation!!
Does it improve efficiency??
Filtering is only useful after you’ve scanned or generated the candidate keys, so you’re still forced to generate and process just as many keys, but you throw most of them away after the work is done.
So, you’re not reducing the actual computational cost, just skipping some post-processing. It’s like searching every page in a phone book and then filtering out the wrong names after you’ve already read them all.
So, no, you don’t gain real efficiency , unless your filter can skip key generation itself, which isn’t the case here.
Example of How a Filter Works:
We want to exclude private keys that contain triple repeating characters (e.g., “aaa”, “111”, etc.), because no valid Bitcoin private key from Puzzles 1-70 has had this pattern.
Without Filter:
• Generate Private Key
• Convert Private Key to Public Key (elliptic curve multiplication).
• Check Public Key: Convert to Bitcoin address, compare with target.
• If Invalid: Discard the result.
With Filter (Efficiency Gain):
• Generate Private Key
• Filter Check: Check if the private key contains any triple repeating characters.
• If the key fails the filter (e.g., contains “aaa” or “111”), skip the public key calculation.
• If the key passes the filter, proceed to the next step.
• Convert Private Key to Public Key (elliptic curve multiplication).
• Check Public Key: Convert to Bitcoin address, compare with target.
• If Invalid: Discard the result.
We need to update filter with every new private keys…