Solved
Bitcoin puzzle #52
Bitcoin puzzle #52 has been solved. Its private key is efae164cb9e3c. The address originally held 0.05 BTC, which was swept by whoever found the key first.
Puzzle #52 at a glance
- Total received
- 0.052 BTC
- Balance now
- 0.0 BTC
- Address
- 15z9c9sVpu6fwNiK7dMAFgMYSK4GqsGZim
- HASH160
- 36af659edbe94453f6344e920d143f1778653ae7
- Range start
- 8000000000000
- Range end
- fffffffffffff
- Bit length
- 52-bit
- Keys in range
- 2.25 × 1015 (2251799813685248)
- Transactions
- 2
The solved key
- Private key
- efae164cb9e3c
- Decimal
- 4216495639600700
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjguYJTZsntce5oQQrh
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 #52 — common questions
How many private keys does Bitcoin puzzle #52 contain?
Puzzle #52 spans the range 2^51 to 2^52−1, which is exactly 2.25 × 10^15 private keys — twice as many as puzzle #51.
How long would it take to solve Bitcoin puzzle #52?
An eight-core machine running this browser solver at four million keys per second would need about 18 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 38 minutes.
How much is Bitcoin puzzle #52 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.052 BTC.
Is Bitcoin puzzle #52 solved?
Yes. Its private key is efae164cb9e3c in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjguYJTZsntce5oQQrh in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #52?
From 8000000000000 to fffffffffffff in hexadecimal. The address is 15z9c9sVpu6fwNiK7dMAFgMYSK4GqsGZim and its HASH160 is 36af659edbe94453f6344e920d143f1778653ae7.