Solved
Bitcoin puzzle #80
Bitcoin puzzle #80 has been solved. Its private key is ea1a5c66dcc11b5ad180. The address originally held 0.80 BTC, which was swept by whoever found the key first.
Puzzle #80 at a glance
- Total received
- 0.80001 BTC
- Balance now
- 0.0 BTC
- Address
- 1BCf6rHUW6m3iH2ptsvnjgLruAiPQQepLe
- HASH160
- 6fe5a36eef0684af0b91f3b6cfc972d68c4f6fab
- Range start
- 80000000000000000000
- Range end
- ffffffffffffffffffff
- Bit length
- 80-bit
- Keys in range
- 6.04 × 1023 (604462909807314587353088)
- Transactions
- 5
The solved key
- Private key
- ea1a5c66dcc11b5ad180
- Decimal
- 1105520030589234487939456
- WIF
- KwDiBf89QgGbjEhKnhXJuH7LrciVrZiAPRB6KvN7FnKsw69PP7vW
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 #80 — common questions
How many private keys does Bitcoin puzzle #80 contain?
Puzzle #80 spans the range 2^79 to 2^80−1, which is exactly 6.04 × 10^23 private keys — twice as many as puzzle #79.
How long would it take to solve Bitcoin puzzle #80?
An eight-core machine running this browser solver at four million keys per second would need about 4.79 billion years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 19,154 years.
How much is Bitcoin puzzle #80 worth?
The address was swept when it was solved, so there is no claimable reward now. It originally received 0.80001 BTC.
Is Bitcoin puzzle #80 solved?
Yes. Its private key is ea1a5c66dcc11b5ad180 in hexadecimal, or KwDiBf89QgGbjEhKnhXJuH7LrciVrZiAPRB6KvN7FnKsw69PP7vW in WIF format. The balance was spent once the key became known.
What is the key range for puzzle #80?
From 80000000000000000000 to ffffffffffffffffffff in hexadecimal. The address is 1BCf6rHUW6m3iH2ptsvnjgLruAiPQQepLe and its HASH160 is 6fe5a36eef0684af0b91f3b6cfc972d68c4f6fab.