Solved
Bitcoin puzzle #16
Bitcoin puzzle #16 has been solved. Its private key is c936. The address originally held 0.02 BTC, which was swept by whoever found the key first.
Puzzle #16 at a glance
- Total received
- 0.01601 BTC
- Balance now
- 0.0 BTC
- Address
- 1BDyrQ6WoF8VN3g9SAS1iKZcPzFfnDVieY
- HASH160
- 7025b4efb3ff42eb4d6d71fab6b53b4f4967e3dd
- Range start
- 8000
- Range end
- ffff
- Bit length
- 16-bit
- Keys in range
- 32,768 (32768)
- Transactions
- 4
The solved key
- Private key
- c936
- Decimal
- 51510
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFbjHrFMWzJp
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 #16 — common questions
How many private keys does Bitcoin puzzle #16 contain?
Puzzle #16 spans the range 2^15 to 2^16−1, which is exactly 32,768 private keys — twice as many as puzzle #15.
How long would it take to solve Bitcoin puzzle #16?
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 #16 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.01601 BTC.
Is Bitcoin puzzle #16 solved?
Yes. Its private key is c936 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFbjHrFMWzJp in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #16?
From 8000 to ffff in hexadecimal. The address is 1BDyrQ6WoF8VN3g9SAS1iKZcPzFfnDVieY and its HASH160 is 7025b4efb3ff42eb4d6d71fab6b53b4f4967e3dd.