IDcollectionsBitcoin puzzle transaction
bits/81
Open since 2015-01-15, the key somewhere in 81 bits. 8.100015 BTC on Bitcoin.
Puzzle / bits
81
bitcoinp2pkh unsolved
Record
puzzle({
chain: "bitcoin",
address: "15qsCm78whsp…xTQopnHZ",
key: bits(81),
})- Prize
- 8.100015 BTC
- Key material
- 81-bit search width
- Verification
- unverifiable
- Solved
- not yet
tx 4
- Trail
- Explorerblockstream.info
- Sourcebitcointalk.org/index.php?topic=5218972
- Trybits/81 in the playground
- Address
- 15qsCm78whspNQFydGJQk5rexzxTQopnHZ
hash160 351e605fac813965951ba433b7c2956bf8ad95ce
Balance
asking the explorer
Key
- range · 81 bits
- 0x100000000000000000000 to 0x1ffffffffffffffffffff
Transactions
- funding2015-01-150.081 BTC08389f34c9…a6cd15
- increase2017-07-110.729 BTC5d45587cfd…384164
- increase2023-04-167.29 BTC12f34b58b0…8d13b3
- increase2025-10-140.000015 BTC3f83b6358b…02b9e2
Techniques
- masked-key-rangecollectionbitcointalk.org/index.php?topic=1306983.msg18765941
Hints
- 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).
Sourcebitcointalk.org/index.php?topic=1306983.msg18765941Confirmweb.archive.org