Solved
Bitcoin puzzle #40
Bitcoin puzzle #40 has been solved. Its private key is e9ae4933d6. The address originally held 0.04 BTC, which was swept by whoever found the key first.
Puzzle #40 at a glance
- Total received
- 0.04 BTC
- Balance now
- 0.0 BTC
- Address
- 1EeAxcprB2PpCnr34VfZdFrkUWuxyiNEFv
- HASH160
- 95a156cd21b4a69de969eb6716864f4c8b82a82a
- Range start
- 8000000000
- Range end
- ffffffffff
- Bit length
- 40-bit
- Keys in range
- 549,755,813,888 (549755813888)
- Transactions
- 2
The solved key
- Private key
- e9ae4933d6
- Decimal
- 1003651412950
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9aFJuCJDo5F6Jm7
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 #40 — common questions
How many private keys does Bitcoin puzzle #40 contain?
Puzzle #40 spans the range 2^39 to 2^40−1, which is exactly 549,755,813,888 private keys — twice as many as puzzle #39.
How long would it take to solve Bitcoin puzzle #40?
An eight-core machine running this browser solver at four million keys per second would need about 2 days 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 #40 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.04 BTC.
Is Bitcoin puzzle #40 solved?
Yes. Its private key is e9ae4933d6 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9aFJuCJDo5F6Jm7 in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #40?
From 8000000000 to ffffffffff in hexadecimal. The address is 1EeAxcprB2PpCnr34VfZdFrkUWuxyiNEFv and its HASH160 is 95a156cd21b4a69de969eb6716864f4c8b82a82a.