Solved
Bitcoin puzzle #85
Bitcoin puzzle #85 has been solved. Its private key is 11720c4f018d51b8cebba8. The address originally held 0.85 BTC, which was swept by whoever found the key first.
Puzzle #85 at a glance
- Total received
- 0.85001 BTC
- Balance now
- 0.0 BTC
- Address
- 1Kh22PvXERd2xpTQk3ur6pPEqFeckCJfAr
- HASH160
- cd03c1e6268ce9b89e3c3eeab8d0f1b6e8cac281
- Range start
- 1000000000000000000000
- Range end
- 1fffffffffffffffffffff
- Bit length
- 85-bit
- Keys in range
- 1.93 × 1025 (19342813113834066795298816)
- Transactions
- 5
The solved key
- Private key
- 11720c4f018d51b8cebba8
- Decimal
- 21090315766411506144426920
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZkCnRjpBspr8M5K8YnUtDNa
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 #85 — common questions
How many private keys does Bitcoin puzzle #85 contain?
Puzzle #85 spans the range 2^84 to 2^85−1, which is exactly 1.93 × 10^25 private keys — twice as many as puzzle #84.
How long would it take to solve Bitcoin puzzle #85?
An eight-core machine running this browser solver at four million keys per second would need about 153 billion years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 612,937 years.
How much is Bitcoin puzzle #85 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.85001 BTC.
Is Bitcoin puzzle #85 solved?
Yes. Its private key is 11720c4f018d51b8cebba8 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZkCnRjpBspr8M5K8YnUtDNa in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #85?
From 1000000000000000000000 to 1fffffffffffffffffffff in hexadecimal. The address is 1Kh22PvXERd2xpTQk3ur6pPEqFeckCJfAr and its HASH160 is cd03c1e6268ce9b89e3c3eeab8d0f1b6e8cac281.