Solved
Bitcoin puzzle #5
Bitcoin puzzle #5 has been solved. Its private key is 15. The address originally held 0.01 BTC, which was swept by whoever found the key first.
Puzzle #5 at a glance
- Total received
- 0.005 BTC
- Balance now
- 0.0 BTC
- Address
- 1E6NuFjCi27W5zoXg8TRdcSRq84zJeBW3k
- HASH160
- 8f9dff39a81ee4abcbad2ad8bafff090415a2be8
- Range start
- 10
- Range end
- 1f
- Bit length
- 5-bit
- Keys in range
- 16 (16)
- Transactions
- 2
The solved key
- Private key
- 15
- Decimal
- 21
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU7Dq8Au4Pv
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 #5 — common questions
How many private keys does Bitcoin puzzle #5 contain?
Puzzle #5 spans the range 2^4 to 2^5−1, which is exactly 16 private keys — twice as many as puzzle #4.
How long would it take to solve Bitcoin puzzle #5?
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 #5 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.005 BTC.
Is Bitcoin puzzle #5 solved?
Yes. Its private key is 15 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU7Dq8Au4Pv in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #5?
From 10 to 1f in hexadecimal. The address is 1E6NuFjCi27W5zoXg8TRdcSRq84zJeBW3k and its HASH160 is 8f9dff39a81ee4abcbad2ad8bafff090415a2be8.