Solved
Bitcoin puzzle #37
Bitcoin puzzle #37 has been solved. Its private key is 1757756a93. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #37 at a glance
- Total received
- 0.037 BTC
- Balance now
- 0.0 BTC
- Address
- 14iXhn8bGajVWegZHJ18vJLHhntcpL4dex
- HASH160
- 28c30fb9118ed1da72e7c4f89c0164756e8a021d
- Range start
- 1000000000
- Range end
- 1fffffffff
- Bit length
- 37-bit
- Keys in range
- 68,719,476,736 (68719476736)
- Transactions
- 2
The solved key
- Private key
- 1757756a93
- Decimal
- 100251560595
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9NRuiZFAX6XciCX
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 #37 — common questions
How many private keys does Bitcoin puzzle #37 contain?
Puzzle #37 spans the range 2^36 to 2^37−1, which is exactly 68,719,476,736 private keys — twice as many as puzzle #36.
How long would it take to solve Bitcoin puzzle #37?
An eight-core machine running this browser solver at four million keys per second would need about 5 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 #37 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.037 BTC.
Is Bitcoin puzzle #37 solved?
Yes. Its private key is 1757756a93 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9NRuiZFAX6XciCX in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #37?
From 1000000000 to 1fffffffff in hexadecimal. The address is 14iXhn8bGajVWegZHJ18vJLHhntcpL4dex and its HASH160 is 28c30fb9118ed1da72e7c4f89c0164756e8a021d.