Solved
Bitcoin puzzle #31
Bitcoin puzzle #31 has been solved. Its private key is 7d4fe747. The address originally held 0.03 BTC, which was swept by whoever found the key first.
Puzzle #31 at a glance
- Total received
- 0.031 BTC
- Balance now
- 0.0 BTC
- Address
- 1LhE6sCTuGae42Axu1L1ZB7L96yi9irEBE
- HASH160
- d805f6f251f7479ebd853b3d0f4b9b2656d92f1d
- Range start
- 40000000
- Range end
- 7fffffff
- Bit length
- 31-bit
- Keys in range
- 1,073,741,824 (1073741824)
- Transactions
- 2
The solved key
- Private key
- 7d4fe747
- Decimal
- 2102388551
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M9SmFMSCA4jQRW
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 #31 — common questions
How many private keys does Bitcoin puzzle #31 contain?
Puzzle #31 spans the range 2^30 to 2^31−1, which is exactly 1,073,741,824 private keys — twice as many as puzzle #30.
How long would it take to solve Bitcoin puzzle #31?
An eight-core machine running this browser solver at four million keys per second would need about 4 minutes 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 #31 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.031 BTC.
Is Bitcoin puzzle #31 solved?
Yes. Its private key is 7d4fe747 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M9SmFMSCA4jQRW in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #31?
From 40000000 to 7fffffff in hexadecimal. The address is 1LhE6sCTuGae42Axu1L1ZB7L96yi9irEBE and its HASH160 is d805f6f251f7479ebd853b3d0f4b9b2656d92f1d.