quizchain2/57

Solved on 2019-07-03 after 10h 3m, key derived from the published recipe. 0.077 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.

Thinking

July 3, 2019. A 77 mBTC block, the second one for the block 53 mistake. The question is one word, Thinking. Format [solution], digits d26. It hints at what Grycoin will be about, says the author.

One word again. Players aren't happy. Where's the fun in a one word puzzle?

A tweet about CO2

Hal Finney's third tweet about Bitcoin, after the famous "running bitcoin": "Thinking about how to reduce CO2 emissions from a widespread Bitcoin implementation". The answer is its URL, and the mobile one again: https://mobile.twitter.com/halfin/status/1153096538.

u/userm1010110 found the tweet, tried the phrase, then the desktop link. Nothing. Then they added mobile. The claim confirmed at 14:42:19 UTC, under seven hours after the post. The same player took block 56 four hours later.

Not everyone took it well. "That WAS SO HORRIBLE", wrote u/Crypto_Rachel, plus a few lines about Grycoin. The author's answer: "Thank you for your angry feedback. I have enjoyed reading it a lot." Peak Quizchain.

IDquizchain2/5757 / 772019-07-03

Puzzle / quizchain2

57

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "128cmgWEf3Cb…aiRhDgyk",
  status: Status.Solved,
  key: wif("L5fbSSbofJhF…zSHNqQN7").entropy("d265daa81817…25875961", source("https://www.…lock_57/")).derived(),
})

Prize: 0.077 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-07-03 · 10h 3m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57; Tryquizchain2/57 in the playground

Address: 128cmgWEf3Cbor5ftazjtisNAfaiRhDgyk

hash160 0c68e5a9278c86cd712b34cbe0141a88c4ab7c19

Balance

asking the explorer

Key

public key · compressed: 03893c868728802733060ed67e18b584887cf89c4b59bdd3d1012fa6410461a839
WIF: L5fbSSbofJhFg5XzETrszGheM53RyQaM2am8ckJMxAuWzSHNqQN7
entropy hash: d265daa81817aeae347023e625875961
entropy source: MD5 of the URL

Transactions

funding2019-07-030.077 BTC5d2ba35d75…4f958a
claim2019-07-030.07674848 BTC3454a6a4c4…6b35b1

Files

Techniques

md5-to-bip39-entropypuzzlereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57

Hints

undated
officialQuestion: Thinking
Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57
Published answer
The solution was the URL to Satoshi's third tweet on Bitcoin (the first one was the more famous "running Bitcoin" one).
Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57
Published answer
https://mobile.twitter.com/halfin/status/1153096538
Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57
undated
officialFirst three digits of MD5 hash are d26.
Sourcereddit.com/r/Grycoin/comments/c8lcsr/77_mbtc_quizchain2_block_57