Solved
Bitcoin puzzle #27
Bitcoin puzzle #27 has been solved. Its private key is 6ac3875. The address originally held 0.03 BTC, which was swept by whoever found the key first.
Puzzle #27 at a glance
- Total received
- 0.027 BTC
- Balance now
- 0.0 BTC
- Address
- 128z5d7nN7PkCuX5qoA4Ys6pmxUYnEy86k
- HASH160
- 0c7aaf6caa7e5424b63d317f0f8f1f9fa40d5560
- Range start
- 4000000
- Range end
- 7ffffff
- Bit length
- 27-bit
- Keys in range
- 67,108,864 (67108864)
- Transactions
- 2
The solved key
- Private key
- 6ac3875
- Decimal
- 111949941
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7wBBz2KJQdASx
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 #27 — common questions
How many private keys does Bitcoin puzzle #27 contain?
Puzzle #27 spans the range 2^26 to 2^27−1, which is exactly 67,108,864 private keys — twice as many as puzzle #26.
How long would it take to solve Bitcoin puzzle #27?
An eight-core machine running this browser solver at four million keys per second would need about 16.8 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 #27 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.027 BTC.
Is Bitcoin puzzle #27 solved?
Yes. Its private key is 6ac3875 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7wBBz2KJQdASx in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #27?
From 4000000 to 7ffffff in hexadecimal. The address is 128z5d7nN7PkCuX5qoA4Ys6pmxUYnEy86k and its HASH160 is 0c7aaf6caa7e5424b63d317f0f8f1f9fa40d5560.