Solved
Bitcoin puzzle #19
Bitcoin puzzle #19 has been solved. Its private key is 5749f. The address originally held 0.02 BTC, which was swept by whoever found the key first.
Puzzle #19 at a glance
- Total received
- 0.019 BTC
- Balance now
- 0.0 BTC
- Address
- 1NWmZRpHH4XSPwsW6dsS3nrNWfL1yrJj4w
- HASH160
- ebfbe6819fcdebab061732ce91df7d586a037dee
- Range start
- 40000
- Range end
- 7ffff
- Bit length
- 19-bit
- Keys in range
- 262,144 (262144)
- Transactions
- 2
The solved key
- Private key
- 5749f
- Decimal
- 357535
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rGP2jMrxCfX3
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 #19 — common questions
How many private keys does Bitcoin puzzle #19 contain?
Puzzle #19 spans the range 2^18 to 2^19−1, which is exactly 262,144 private keys — twice as many as puzzle #18.
How long would it take to solve Bitcoin puzzle #19?
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 #19 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.019 BTC.
Is Bitcoin puzzle #19 solved?
Yes. Its private key is 5749f in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rGP2jMrxCfX3 in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #19?
From 40000 to 7ffff in hexadecimal. The address is 1NWmZRpHH4XSPwsW6dsS3nrNWfL1yrJj4w and its HASH160 is ebfbe6819fcdebab061732ce91df7d586a037dee.