quizchain/28

Solved on 2019-04-12 after 15h 43m, key derived from the published recipe. 0.007 BTC on Bitcoin.

Story

What the post asked, what the answer turned out to be, and what the chain says happened. The record below holds the data.

BFU

"What is BFU?" Posted at night, angry, unable to sleep after block 27.

BruteFUFUFUFUFUFUFUFUFU, nine FUs for the nine mBTC of block 27. The author later called it wrong in more than one way, and wished it had been BotFU.

A comment ten hours later says the link should be NM2, not MA2. The funded hash uses MA2, which really is the tail of the block 27 key. So the correction was the mistake.

IDquizchain/2828 / 772019-04-11 → 2019-04-12

Puzzle / quizchain

28

bitcoinp2pkh solved

Record

bitcoinPuzzle({
  address: p2pkh("19PEtVBuiFeA…6xwRBFpH", "5bf5c012f295…77363511"),
  status: Status.Solved,
  key: wif("KwmmWhLkyVqE…GtkJszff").entropy("535380e31644…974a5459", source("https://www.…lock_28/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-04-12 · 15h 43m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/bitcoinpuzzles/comments/bc3l0m/hard_7mbtc_quizchain_block_28; Tryquizchain/28 in the playground

Address: 19PEtVBuiFeAAKU5uhGyZ5NwsK6xwRBFpH

hash160 5bf5c012f2955cad02529d0d9d6343da77363511

Balance

asking the explorer

Key

public key · compressed: 032db1e52b7290ddfa97d99b9a19e3ed843cffbbb44d95cee212aefc7bc98da2ad
WIF: KwmmWhLkyVqELbEUFx4EyReV2qz6kn7j82yUoLgTu9sUGtkJszff
entropy hash: 535380e31644c8f30e484e9c974a5459
entropy source: MD5 of the solution, a space and the last three characters of the block 27 key

Transactions

funding2019-04-110.007 BTC2b91c510c7…fa64b9
claim2019-04-120.00679648 BTC9aa47a9a1b…a92d11

Hints

undated
officialQuestion: What is BFU?
Sourcereddit.com/r/bitcoinpuzzles/comments/bc3l0m/hard_7mbtc_quizchain_block_28
Published answer
Solution was BruteFUFUFUFUFUFUFUFUFU
Sourcereddit.com/r/bitcoinpuzzles/comments/bc3l0m/hard_7mbtc_quizchain_block_28
undated
officialFormat: [solution] [link] with one space between.
Sourcereddit.com/r/bitcoinpuzzles/comments/bc3l0m/hard_7mbtc_quizchain_block_28
undated
officialEmergency update: Another screw up. Link for this needs to be NM2, not MA2.
Sourcereddit.com/r/bitcoinpuzzles/comments/bc3l0m/comment/ekovkao