Solved
Bitcoin puzzle #39
Bitcoin puzzle #39 has been solved. Its private key is 4b5f8303e9. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #39 at a glance
- Total received
- 0.03911 BTC
- Balance now
- 0.0 BTC
- Address
- 122AJhKLEfkFBaGAd84pLp1kfE7xK3GdT8
- HASH160
- 0b304f2a79a027270276533fe1ed4eff30910876
- Range start
- 4000000000
- Range end
- 7fffffffff
- Bit length
- 39-bit
- Keys in range
- 274,877,906,944 (274877906944)
- Transactions
- 6
The solved key
- Private key
- 4b5f8303e9
- Decimal
- 323724968937
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9RMTSCcQzX3EjMZ
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 #39 — common questions
How many private keys does Bitcoin puzzle #39 contain?
Puzzle #39 spans the range 2^38 to 2^39−1, which is exactly 274,877,906,944 private keys — twice as many as puzzle #38.
How long would it take to solve Bitcoin puzzle #39?
An eight-core machine running this browser solver at four million keys per second would need about 19 hours 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 #39 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.03911 BTC.
Is Bitcoin puzzle #39 solved?
Yes. Its private key is 4b5f8303e9 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9RMTSCcQzX3EjMZ in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #39?
From 4000000000 to 7fffffffff in hexadecimal. The address is 122AJhKLEfkFBaGAd84pLp1kfE7xK3GdT8 and its HASH160 is 0b304f2a79a027270276533fe1ed4eff30910876.