IDcollectionsBitcoin puzzle transaction

bits/84

Open since 2015-01-15, the key somewhere in 84 bits. 8.400015 BTC on Bitcoin.

IDbits/8484 / 2562015-01-15
Puzzle / bits

84

bitcoinp2pkh unsolved

Record

puzzle({
  chain: "bitcoin",
  address: "1CMq3SvFcVEc…K1oicG2D",
  key: bits(84),
})
Prize
8.400015 BTC
Key material
84-bit search width
Verification
unverifiable
Solved
not yet
tx 4
Trail
Explorerblockstream.info
Sourcebitcointalk.org/index.php?topic=5218972
Trybits/84 in the playground
Address
1CMq3SvFcVEcpLMuuH8PUcNiqsK1oicG2D

hash160 7c99ce73e19f9fbfcce4825ae88261e2b0b0b040

Balance
asking the explorer

Key

range · 84 bits
0x800000000000000000000 to 0xfffffffffffffffffffff

Transactions

  1. funding2015-01-150.084 BTC08389f34c9…a6cd15
  2. increase2017-07-110.756 BTC5d45587cfd…384164
  3. increase2023-04-167.56 BTC12f34b58b0…8d13b3
  4. increase2025-10-280.000015 BTC99e69ed74a…f47d0e

Techniques

  1. masked-key-rangecollectionbitcointalk.org/index.php?topic=1306983.msg18765941

Hints

  1. 2017-04-2706:41:08

    officialcollectionThere is no pattern. It is just consecutive keys from a deterministic wallet (masked with leading 000...0001 to set difficulty).