Solved
Bitcoin puzzle #15
Bitcoin puzzle #15 has been solved. Its private key is 68f3. The address originally held 0.01 BTC, which was swept by whoever found the key first.
Puzzle #15 at a glance
- Total received
- 0.015 BTC
- Balance now
- 0.0 BTC
- Address
- 1QCbW9HWnwQWiQqVo5exhAnmfqKRrCRsvW
- HASH160
- fe7c45126731f7384640b0b0045fd40bac72e2a2
- Range start
- 4000
- Range end
- 7fff
- Bit length
- 15-bit
- Keys in range
- 16,384 (16384)
- Transactions
- 2
The solved key
- Private key
- 68f3
- Decimal
- 26867
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFY5iMZbuRxj
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 #15 — common questions
How many private keys does Bitcoin puzzle #15 contain?
Puzzle #15 spans the range 2^14 to 2^15−1, which is exactly 16,384 private keys — twice as many as puzzle #14.
How long would it take to solve Bitcoin puzzle #15?
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 #15 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.015 BTC.
Is Bitcoin puzzle #15 solved?
Yes. Its private key is 68f3 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFY5iMZbuRxj in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #15?
From 4000 to 7fff in hexadecimal. The address is 1QCbW9HWnwQWiQqVo5exhAnmfqKRrCRsvW and its HASH160 is fe7c45126731f7384640b0b0045fd40bac72e2a2.