More about Bitcoin Puzzle.

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The Bitcoin Puzzle is a legendary cryptographic challenge created in 2015. It consists of 75 public addresses containing a total of 969 BTC. Anyone can claim the coins if they can guess or compute the private key for the right wallet.

How the puzzle is structured.
The task involves finding specific secret (private) keys for addresses on the Bitcoin network.
Difficulty: The keys are numbered from 1 to 2²⁵⁶. To put it in perspective, the key space (number of possible combinations) is an astronomical number: 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936.
Rung ladder: The first few hundred or thousand combinations were solved by enthusiasts almost immediately, as they contained microscopic amounts (dust). However, with each new "puzzle," the amount increases, and the number of required mathematical calculations grows exponentially.

Current status as of today.
Prize pool: Currently, the most "expensive" levels remain unsolved. The addresses contain from 1 to 6.9 BTC (for example, puzzles 67 and 68 contain 6.7 and 6.8 BTC respectively). The total prize pool amounts to hundreds of coins.
Solving process: Enthusiasts and pools around the world combine computing power (using Pollard's kangaroo algorithm and specialized software), sifting through tens of millions of keys daily.

Important nuances.
Solving does not require blockchain hacking: The private keys already exist, they are rigidly tied to addresses according to Bitcoin network rules. They need to be mathematically guessed, not regenerated.
Sniper bots (security threat): If you guess a key and send a transaction to the public mempool to withdraw funds, special "parasite" bots can instantly intercept the public key, compute the private key, and steal the coins via a higher-fee transaction. Safely withdrawing the prize requires advanced technical skills (e.g., transactions without broadcasting to the public network).