Solved
Bitcoin puzzle #38
Bitcoin puzzle #38 has been solved. Its private key is 22382facd0. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #38 at a glance
- Total received
- 0.038 BTC
- Balance now
- 0.0 BTC
- Address
- 1HBtApAFA9B2YZw3G2YKSMCtb3dVnjuNe2
- HASH160
- b190e2d40cfdeee2cee072954a2be89e7ba39364
- Range start
- 2000000000
- Range end
- 3fffffffff
- Bit length
- 38-bit
- Keys in range
- 137,438,953,472 (137438953472)
- Transactions
- 2
The solved key
- Private key
- 22382facd0
- Decimal
- 146971536592
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9P3MahktLW5315v
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 #38 — common questions
How many private keys does Bitcoin puzzle #38 contain?
Puzzle #38 spans the range 2^37 to 2^38−1, which is exactly 137,438,953,472 private keys — twice as many as puzzle #37.
How long would it take to solve Bitcoin puzzle #38?
An eight-core machine running this browser solver at four million keys per second would need about 10 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 #38 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.038 BTC.
Is Bitcoin puzzle #38 solved?
Yes. Its private key is 22382facd0 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9P3MahktLW5315v in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #38?
From 2000000000 to 3fffffffff in hexadecimal. The address is 1HBtApAFA9B2YZw3G2YKSMCtb3dVnjuNe2 and its HASH160 is b190e2d40cfdeee2cee072954a2be89e7ba39364.