Solved
Bitcoin puzzle #75
Bitcoin puzzle #75 has been solved. Its private key is 4c5ce114686a1336e07. The address originally held 0.75 BTC, which was swept by whoever found the key first.
Puzzle #75 at a glance
- Total received
- 0.75001 BTC
- Balance now
- 0.0 BTC
- Address
- 1J36UjUByGroXcCvmj13U6uwaVv9caEeAt
- HASH160
- badf8b0d34289e679ec65c6c61d3a974353be5cf
- Range start
- 4000000000000000000
- Range end
- 7ffffffffffffffffff
- Bit length
- 75-bit
- Keys in range
- 1.88 × 1022 (18889465931478580854784)
- Transactions
- 5
The solved key
- Private key
- 4c5ce114686a1336e07
- Decimal
- 22538323240989823823367
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3yHuxB7NfERRuDTNy2kbr
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 #75 — common questions
How many private keys does Bitcoin puzzle #75 contain?
Puzzle #75 spans the range 2^74 to 2^75−1, which is exactly 1.88 × 10^22 private keys — twice as many as puzzle #74.
How long would it take to solve Bitcoin puzzle #75?
An eight-core machine running this browser solver at four million keys per second would need about 150 million years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 599 years.
How much is Bitcoin puzzle #75 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.75001 BTC.
Is Bitcoin puzzle #75 solved?
Yes. Its private key is 4c5ce114686a1336e07 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3yHuxB7NfERRuDTNy2kbr in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #75?
From 4000000000000000000 to 7ffffffffffffffffff in hexadecimal. The address is 1J36UjUByGroXcCvmj13U6uwaVv9caEeAt and its HASH160 is badf8b0d34289e679ec65c6c61d3a974353be5cf.