quizchain2/56

Solved on 2019-07-03 after 1d 7h 40m, 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.

unlucky

July 2, 2019. The question is one word, unlucky, about how the author felt after block 53. No TOMI field, no format hint. Digits b9f.

"If you see the method, it will be very easy." Nobody saw it. A day later the author forgot the hint. "Very sad mistake." u/Crypto_Rachel had stayed up all night for it, on their birthday morning. Ouch.

Post number 56

The hint came: something Hal Finney said. For the author, Hal is Satoshi. So open Satoshi's posts on Bitcointalk, take post number 56 and the sentence with unlucky in it:

Maybe you were just unlucky to have an exit node without reverse lookup.

Full stop included. u/userm1010110 copy pasted it from the forum. The claim confirmed at 18:58:23 UTC on July 3, 30 hours after the post. Their second win that day, after block 57. Unlucky? Not them.

IDquizchain2/5656 / 772019-07-02 → 2019-07-03

Puzzle / quizchain2

56

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "14tuS6dG5BXd…AuET74P5",
  status: Status.Solved,
  key: wif("L17Yo2Tz1HVJ…Kbn66cAB").entropy("b9f039524fd1…429c573e", source("https://www.…lock_56/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-07-03 · 1d 7h 40m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56; Tryquizchain2/56 in the playground

Address: 14tuS6dG5BXd1usDTUJduEDafFAuET74P5

hash160 2ab95c2a65984df1992c01ae422fc814e13dd54a

Balance

asking the explorer

Key

public key · compressed: 03a1ea1a601498f87a2e4623356412690bc589622568a011838ddab4750ecc23d4
WIF: L17Yo2Tz1HVJwrHeQj9tvruYffvna3pEZEGfJ6ToGEZpKbn66cAB
entropy hash: b9f039524fd1a9043817541f429c573e
entropy source: MD5 of the sentence

Transactions

funding2019-07-020.007 BTCf4bcd3b948…2c4d68
claim2019-07-030.00674829 BTCc200e52970…8dcbcd

Files

Techniques

md5-to-bip39-entropypuzzlereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56

Hints

undated
officialQuestion: unlucky
Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56
Published answer
Method was using the post number 56 (number of this block) Hal as Satoshi on Bitcointalk and using the whole sentence the word "unlucky" appeared in as a solution, which works out to "Maybe you were just unlucky to have an exit node without reverse lookup."
Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56
Published answer
"Maybe you were just unlucky to have an exit node without reverse lookup." exactly as Satoshi said in Bitcointalk forum in his own post number of 56, only first statement of it also. (I copy pasted it)
Sourcereddit.com/r/Grycoin/comments/c88x4w/comment/esp6ny4
undated
officialFirst three digits of MD5 hash are b9f.
Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56
undated
officialHint 1: Something Hal Finney said.
Sourcereddit.com/r/Grycoin/comments/c88x4w/7_mbtc_quizchain2_block_56