Solved
Bitcoin puzzle #41
Bitcoin puzzle #41 has been solved. Its private key is 153869acc5b. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #41 at a glance
- Total received
- 0.041 BTC
- Balance now
- 0.0 BTC
- Address
- 1L5sU9qvJeuwQUdt4y1eiLmquFxKjtHr3E
- HASH160
- d1562eb37357f9e6fc41cb2359f4d3eda4032329
- Range start
- 10000000000
- Range end
- 1ffffffffff
- Bit length
- 41-bit
- Keys in range
- 1,099,511,627,776 (1099511627776)
- Transactions
- 2
The solved key
- Private key
- 153869acc5b
- Decimal
- 1458252205147
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9gCD9CBomewdcUD
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 #41 — common questions
How many private keys does Bitcoin puzzle #41 contain?
Puzzle #41 spans the range 2^40 to 2^41−1, which is exactly 1,099,511,627,776 private keys — twice as many as puzzle #40.
How long would it take to solve Bitcoin puzzle #41?
An eight-core machine running this browser solver at four million keys per second would need about 3 days to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 1.1 seconds.
How much is Bitcoin puzzle #41 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.041 BTC.
Is Bitcoin puzzle #41 solved?
Yes. Its private key is 153869acc5b in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9gCD9CBomewdcUD in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #41?
From 10000000000 to 1ffffffffff in hexadecimal. The address is 1L5sU9qvJeuwQUdt4y1eiLmquFxKjtHr3E and its HASH160 is d1562eb37357f9e6fc41cb2359f4d3eda4032329.