Solved
Bitcoin puzzle #64
Bitcoin puzzle #64 has been solved. Its private key is f7051f27b09112d4. The address originally held 0.64 BTC, which was swept by whoever found the key first.
Puzzle #64 at a glance
- Total received
- 0.64040459 BTC
- Balance now
- 0.0 BTC
- Address
- 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN
- HASH160
- 3ee4133d991f52fdf6a25c9834e0745ac74248a4
- Range start
- 8000000000000000
- Range end
- ffffffffffffffff
- Bit length
- 64-bit
- Keys in range
- 9.22 × 1018 (9223372036854775808)
- Transactions
- 17
The solved key
- Private key
- f7051f27b09112d4
- Decimal
- 17799667357578236628
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qZ6FxoaD5r1kYegmtbaT
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 #64 — common questions
How many private keys does Bitcoin puzzle #64 contain?
Puzzle #64 spans the range 2^63 to 2^64−1, which is exactly 9.22 × 10^18 private keys — twice as many as puzzle #63.
How long would it take to solve Bitcoin puzzle #64?
An eight-core machine running this browser solver at four million keys per second would need about 73,068 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 107 days.
How much is Bitcoin puzzle #64 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.64040459 BTC.
Is Bitcoin puzzle #64 solved?
Yes. Its private key is f7051f27b09112d4 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qZ6FxoaD5r1kYegmtbaT in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #64?
From 8000000000000000 to ffffffffffffffff in hexadecimal. The address is 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN and its HASH160 is 3ee4133d991f52fdf6a25c9834e0745ac74248a4.