Solved
Bitcoin puzzle #43
Bitcoin puzzle #43 has been solved. Its private key is 6bd3b27c591. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #43 at a glance
- Total received
- 0.043 BTC
- Balance now
- 0.0 BTC
- Address
- 1PiFuqGpG8yGM5v6rNHWS3TjsG6awgEGA1
- HASH160
- f92044c7924e5525c61207972c253c9fc9f086f7
- Range start
- 40000000000
- Range end
- 7ffffffffff
- Bit length
- 43-bit
- Keys in range
- 4,398,046,511,104 (4398046511104)
- Transactions
- 2
The solved key
- Private key
- 6bd3b27c591
- Decimal
- 7409811047825
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgdB23bP5LsYN8Krv7
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 #43 — common questions
How many private keys does Bitcoin puzzle #43 contain?
Puzzle #43 spans the range 2^42 to 2^43−1, which is exactly 4,398,046,511,104 private keys — twice as many as puzzle #42.
How long would it take to solve Bitcoin puzzle #43?
An eight-core machine running this browser solver at four million keys per second would need about 13 days to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 4.4 seconds.
How much is Bitcoin puzzle #43 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.043 BTC.
Is Bitcoin puzzle #43 solved?
Yes. Its private key is 6bd3b27c591 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgdB23bP5LsYN8Krv7 in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #43?
From 40000000000 to 7ffffffffff in hexadecimal. The address is 1PiFuqGpG8yGM5v6rNHWS3TjsG6awgEGA1 and its HASH160 is f92044c7924e5525c61207972c253c9fc9f086f7.