Solved
Bitcoin puzzle #2
Bitcoin puzzle #2 has been solved. Its private key is 3. The address originally held 0.00 BTC, which was swept by whoever found the key first.
Puzzle #2 at a glance
- Total received
- 0.00226546 BTC
- Balance now
- 0.0 BTC
- Address
- 1CUNEBjYrCn2y1SdiUMohaKUi4wpP326Lb
- HASH160
- 7dd65592d0ab2fe0d0257d571abf032cd9db93dc
- Range start
- 2
- Range end
- 3
- Bit length
- 2-bit
- Keys in range
- 2 (2)
- Transactions
- 12
The solved key
- Private key
- 3
- Decimal
- 3
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU74sHUHy8S
Verify it yourself: multiply this key by the secp256k1 generator point, compress the resulting public key, and take RIPEMD-160(SHA-256(·)). You get exactly the HASH160 above. This site performs that check on every published key at build time.
Puzzle #2 — common questions
How many private keys does Bitcoin puzzle #2 contain?
Puzzle #2 spans the range 2^1 to 2^2−1, which is exactly 2 private keys — twice as many as puzzle #1.
How long would it take to solve Bitcoin puzzle #2?
An eight-core machine running this browser solver at four million keys per second would need about < 1 seconds to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about < 1 seconds.
How much is Bitcoin puzzle #2 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.00226546 BTC.
Is Bitcoin puzzle #2 solved?
Yes. Its private key is 3 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU74sHUHy8S in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #2?
From 2 to 3 in hexadecimal. The address is 1CUNEBjYrCn2y1SdiUMohaKUi4wpP326Lb and its HASH160 is 7dd65592d0ab2fe0d0257d571abf032cd9db93dc.