Solved
Bitcoin puzzle #8
Bitcoin puzzle #8 has been solved. Its private key is e0. The address originally held 0.01 BTC, which was swept by whoever found the key first.
Puzzle #8 at a glance
- Total received
- 0.008 BTC
- Balance now
- 0.0 BTC
- Address
- 1M92tSqNmQLYw33fuBvjmeadirh1ysMBxK
- HASH160
- dce76b2613052ea012204404a97b3c25eac31715
- Range start
- 80
- Range end
- ff
- Bit length
- 8-bit
- Keys in range
- 128 (128)
- Transactions
- 2
The solved key
- Private key
- e0
- Decimal
- 224
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU8xvGK1zpm
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 #8 — common questions
How many private keys does Bitcoin puzzle #8 contain?
Puzzle #8 spans the range 2^7 to 2^8−1, which is exactly 128 private keys — twice as many as puzzle #7.
How long would it take to solve Bitcoin puzzle #8?
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 #8 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.008 BTC.
Is Bitcoin puzzle #8 solved?
Yes. Its private key is e0 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU8xvGK1zpm in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #8?
From 80 to ff in hexadecimal. The address is 1M92tSqNmQLYw33fuBvjmeadirh1ysMBxK and its HASH160 is dce76b2613052ea012204404a97b3c25eac31715.