Solved
Bitcoin puzzle #4
Bitcoin puzzle #4 has been solved. Its private key is 8. The address originally held 0.00 BTC, which was swept by whoever found the key first.
Puzzle #4 at a glance
- Total received
- 0.00401601 BTC
- Balance now
- 0.0 BTC
- Address
- 1EhqbyUMvvs7BfL8goY6qcPbD6YKfPqb7e
- HASH160
- 9652d86bedf43ad264362e6e6eba6eb764508127
- Range start
- 8
- Range end
- f
- Bit length
- 4-bit
- Keys in range
- 8 (8)
- Transactions
- 4
The solved key
- Private key
- 8
- Decimal
- 8
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU77MfhviY5
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 #4 — common questions
How many private keys does Bitcoin puzzle #4 contain?
Puzzle #4 spans the range 2^3 to 2^4−1, which is exactly 8 private keys — twice as many as puzzle #3.
How long would it take to solve Bitcoin puzzle #4?
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 #4 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.00401601 BTC.
Is Bitcoin puzzle #4 solved?
Yes. Its private key is 8 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU77MfhviY5 in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #4?
From 8 to f in hexadecimal. The address is 1EhqbyUMvvs7BfL8goY6qcPbD6YKfPqb7e and its HASH160 is 9652d86bedf43ad264362e6e6eba6eb764508127.