Solved
Bitcoin puzzle #25
Bitcoin puzzle #25 has been solved. Its private key is 1fa5ee5. The address originally held 0.03 BTC, which was swept by whoever found the key first.
Puzzle #25 at a glance
- Total received
- 0.025 BTC
- Balance now
- 0.0 BTC
- Address
- 15JhYXn6Mx3oF4Y7PcTAv2wVVAuCFFQNiP
- HASH160
- 2f396b29b27324300d0c59b17c3abc1835bd3dbb
- Range start
- 1000000
- Range end
- 1ffffff
- Bit length
- 25-bit
- Keys in range
- 16,777,216 (16777216)
- Transactions
- 2
The solved key
- Private key
- 1fa5ee5
- Decimal
- 33185509
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7siAXycwkwRQg
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 #25 — common questions
How many private keys does Bitcoin puzzle #25 contain?
Puzzle #25 spans the range 2^24 to 2^25−1, which is exactly 16,777,216 private keys — twice as many as puzzle #24.
How long would it take to solve Bitcoin puzzle #25?
An eight-core machine running this browser solver at four million keys per second would need about 4.2 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 #25 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.025 BTC.
Is Bitcoin puzzle #25 solved?
Yes. Its private key is 1fa5ee5 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7siAXycwkwRQg in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #25?
From 1000000 to 1ffffff in hexadecimal. The address is 15JhYXn6Mx3oF4Y7PcTAv2wVVAuCFFQNiP and its HASH160 is 2f396b29b27324300d0c59b17c3abc1835bd3dbb.