Solved
Bitcoin puzzle #47
Bitcoin puzzle #47 has been solved. Its private key is 6cd610b53cba. The address originally held 0.05 BTC, which was swept by whoever found the key first.
Puzzle #47 at a glance
- Total received
- 0.0473496 BTC
- Balance now
- 0.0 BTC
- Address
- 1Pd8VvT49sHKsmqrQiP61RsVwmXCZ6ay7Z
- HASH160
- f828005d41b0f4fed4c8dca3b06011072cfb07d4
- Range start
- 400000000000
- Range end
- 7fffffffffff
- Bit length
- 47-bit
- Keys in range
- 70,368,744,177,664 (70368744177664)
- Transactions
- 4
The solved key
- Private key
- 6cd610b53cba
- Decimal
- 119666659114170
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgdcLTenJYVVVTRzxN
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 #47 — common questions
How many private keys does Bitcoin puzzle #47 contain?
Puzzle #47 spans the range 2^46 to 2^47−1, which is exactly 70,368,744,177,664 private keys — twice as many as puzzle #46.
How long would it take to solve Bitcoin puzzle #47?
An eight-core machine running this browser solver at four million keys per second would need about 204 days to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 1 minutes.
How much is Bitcoin puzzle #47 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.0473496 BTC.
Is Bitcoin puzzle #47 solved?
Yes. Its private key is 6cd610b53cba in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgdcLTenJYVVVTRzxN in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #47?
From 400000000000 to 7fffffffffff in hexadecimal. The address is 1Pd8VvT49sHKsmqrQiP61RsVwmXCZ6ay7Z and its HASH160 is f828005d41b0f4fed4c8dca3b06011072cfb07d4.