Solved
Bitcoin puzzle #20
Bitcoin puzzle #20 has been solved. Its private key is d2c55. The address originally held 0.02 BTC, which was swept by whoever found the key first.
Puzzle #20 at a glance
- Total received
- 0.02004182 BTC
- Balance now
- 0.0 BTC
- Address
- 1HsMJxNiV7TLxmoF6uJNkydxPFDog4NQum
- HASH160
- b907c3a2a3b27789dfb509b730dd47703c272868
- Range start
- 80000
- Range end
- fffff
- Bit length
- 20-bit
- Keys in range
- 524,288 (524288)
- Transactions
- 4
The solved key
- Private key
- d2c55
- Decimal
- 863317
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rHfuE2Tg4nJW
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 #20 — common questions
How many private keys does Bitcoin puzzle #20 contain?
Puzzle #20 spans the range 2^19 to 2^20−1, which is exactly 524,288 private keys — twice as many as puzzle #19.
How long would it take to solve Bitcoin puzzle #20?
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 #20 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.02004182 BTC.
Is Bitcoin puzzle #20 solved?
Yes. Its private key is d2c55 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rHfuE2Tg4nJW in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #20?
From 80000 to fffff in hexadecimal. The address is 1HsMJxNiV7TLxmoF6uJNkydxPFDog4NQum and its HASH160 is b907c3a2a3b27789dfb509b730dd47703c272868.