CoinDesk
A user who had spent eight weeks brute-forcing roughly 3.5 trillion password combinations against their current Blockchain.com wallet recovered 5 BTC (~$395,000 at press) by handing the contents of an old college computer to Anthropic's Claude. The AI located a December 2019 wallet backup file buried in years of drive clutter, and the owner decrypted it with a password they had already written down in a notebook: "lol420fuckthePOLICE!:)". Total spending on the failed brute-force attempts was about $15 in rented Vast.ai GPU time.
The episode drew viral attention on X after user @cprkrn posted the recovery, but the story is more about lost-bitcoin archaeology than cryptography. No private-key security was broken — the old backup contained the same keys as the current wallet, since Bitcoin private keys never change, and the password had always been on paper. Breaking Bitcoin's actual cryptography would require a quantum computer running Shor's algorithm or a sixteen-year-undiscovered flaw in elliptic-curve math, neither of which is in evidence here.
Why it matters
What changed is the accessibility of recovery for non-technical holders. Tools like btcrecover have existed for years to test password variations against encrypted wallet files, but the real bottleneck has always been finding the right file in the first place — sorting through old drives, backup partitions, and forgotten cloud archives. An AI assistant that can scan unstructured data and surface candidate files compresses that detective work into a single prompt. With an estimated millions of Bitcoin sitting in wallets whose owners have lost passwords, drives, or recovery phrases, that capability has real economic value even though the underlying crypto stack is unchanged.
Market impact
The story is a reminder of how much supply remains effectively locked. With Bitcoin trading near $79,000, forgotten laptops, old external drives, and paper notebooks from the 2010–2019 era are quietly sitting on six- and seven-figure positions.
Frequently asked questions
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Did Claude actually crack a Bitcoin wallet?
No. The AI helped the owner locate a 2019 wallet backup file on their own computer, and the password was already written down in a notebook. No Bitcoin cryptography was broken.
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How much Bitcoin was recovered in the incident?
The owner recovered 5 BTC, worth roughly $395,000 at the time of the recovery, from a December 2019 Blockchain.com wallet backup.
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What password unlocked the old wallet backup?
The owner disclosed on X that the password was "lol420fuckthePOLICE!:)", which they had written in a notebook years earlier.
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How much did the failed brute-force attempts cost?
Roughly $15 in GPU time rented through Vast.ai, spent testing about 3.5 trillion password combinations over eight weeks before the AI-assisted file search succeeded.
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Could AI realistically unlock other forgotten Bitcoin wallets?
Yes, for the same reason it worked here: the bottleneck for most non-technical owners is finding the right wallet file, not cracking the encryption. AI assistants can scan old drives for forgotten backups that decrypt with passwords the owner still has.
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