Solved
Bitcoin puzzle #56
Bitcoin puzzle #56 has been solved. Its private key is 9d18b63ac4ffdf. The address originally held 0.71 BTC, which was swept by whoever found the key first.
Puzzle #56 at a glance
- Total received
- 0.71343285 BTC
- Balance now
- 0.0 BTC
- Address
- 17aPYR1m6pVAacXg1PTDDU7XafvK1dxvhi
- HASH160
- 48214c5969ae9f43f75070cea1e2cb41d5bdcccd
- Range start
- 80000000000000
- Range end
- ffffffffffffff
- Bit length
- 56-bit
- Keys in range
- 3.60 × 1016 (36028797018963968)
- Transactions
- 14
The solved key
- Private key
- 9d18b63ac4ffdf
- Decimal
- 44218742292676575
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjjb65nDHeqyjiBaJXv
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 #56 — common questions
How many private keys does Bitcoin puzzle #56 contain?
Puzzle #56 spans the range 2^55 to 2^56−1, which is exactly 3.60 × 10^16 private keys — twice as many as puzzle #55.
How long would it take to solve Bitcoin puzzle #56?
An eight-core machine running this browser solver at four million keys per second would need about 285 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 10 hours.
How much is Bitcoin puzzle #56 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.71343285 BTC.
Is Bitcoin puzzle #56 solved?
Yes. Its private key is 9d18b63ac4ffdf in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjjb65nDHeqyjiBaJXv in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #56?
From 80000000000000 to ffffffffffffff in hexadecimal. The address is 17aPYR1m6pVAacXg1PTDDU7XafvK1dxvhi and its HASH160 is 48214c5969ae9f43f75070cea1e2cb41d5bdcccd.