Solved
Bitcoin puzzle #49
Bitcoin puzzle #49 has been solved. Its private key is 174176b015f4d. The address originally held 0.05 BTC, which was swept by whoever found the key first.
Puzzle #49 at a glance
- Total received
- 0.049 BTC
- Balance now
- 0.0 BTC
- Address
- 12CiUhYVTTH33w3SPUBqcpMoqnApAV4WCF
- HASH160
- 0d2f533966c6578e1111978ca698f8add7fffdf3
- Range start
- 1000000000000
- Range end
- 1ffffffffffff
- Bit length
- 49-bit
- Keys in range
- 281,474,976,710,656 (281474976710656)
- Transactions
- 2
The solved key
- Private key
- 174176b015f4d
- Decimal
- 409118905032525
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgejcjwprJ4MAYLw8e
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 #49 — common questions
How many private keys does Bitcoin puzzle #49 contain?
Puzzle #49 spans the range 2^48 to 2^49−1, which is exactly 281,474,976,710,656 private keys — twice as many as puzzle #48.
How long would it take to solve Bitcoin puzzle #49?
An eight-core machine running this browser solver at four million keys per second would need about 2 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 5 minutes.
How much is Bitcoin puzzle #49 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.049 BTC.
Is Bitcoin puzzle #49 solved?
Yes. Its private key is 174176b015f4d in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgejcjwprJ4MAYLw8e in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #49?
From 1000000000000 to 1ffffffffffff in hexadecimal. The address is 12CiUhYVTTH33w3SPUBqcpMoqnApAV4WCF and its HASH160 is 0d2f533966c6578e1111978ca698f8add7fffdf3.