Solved
Bitcoin puzzle #7
Bitcoin puzzle #7 has been solved. Its private key is 4c. The address originally held 0.01 BTC, which was swept by whoever found the key first.
Puzzle #7 at a glance
- Total received
- 0.007 BTC
- Balance now
- 0.0 BTC
- Address
- 1McVt1vMtCC7yn5b9wgX1833yCcLXzueeC
- HASH160
- e2192e8a7dd8dd1c88321959b477968b941aa973
- Range start
- 40
- Range end
- 7f
- Bit length
- 7-bit
- Keys in range
- 64 (64)
- Transactions
- 2
The solved key
- Private key
- 4c
- Decimal
- 76
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU7hDgvu64y
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 #7 — common questions
How many private keys does Bitcoin puzzle #7 contain?
Puzzle #7 spans the range 2^6 to 2^7−1, which is exactly 64 private keys — twice as many as puzzle #6.
How long would it take to solve Bitcoin puzzle #7?
An eight-core machine running this browser solver at four million keys per second would need about < 1 seconds 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 #7 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.007 BTC.
Is Bitcoin puzzle #7 solved?
Yes. Its private key is 4c in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU7hDgvu64y in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #7?
From 40 to 7f in hexadecimal. The address is 1McVt1vMtCC7yn5b9wgX1833yCcLXzueeC and its HASH160 is e2192e8a7dd8dd1c88321959b477968b941aa973.