quizchain2/20

Solved on 2019-05-28 after 2h 52m, 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.

A vanity address

May 28, 2019. The question is an address: 1AndrewYangForPresident2o2o6zmPzd. The format is [solution], digits 497. The author expected it to be a bit harder than block 19.

It wasn't. Nobody holds the key to an address like that. Coins sent there are gone for good. So the solution is just burn address.

The claim confirmed at 04:10:09 UTC, twelve minutes after the post. u/Randomiser posted the answer once it confirmed. u/MegaBit01 solved it too, tried to sweep with Electrum and got an error. The coins were already gone.

The swapped characters

u/mapl3sn0w spotted something. The real address ends in zm6Pzd, and the question says 6zmPzd. A typo? The author said it had no influence on the solution.

u/Quantris made a sharper point. Swap two characters and the checksum breaks, so the address in the question isn't valid at all. You can't burn anything to it. Checked here: @agntn/keys rejects the question's version and accepts the one with zm6P.

So the answer to "what is this?" is technically "not an address". Still burn address on the chain, though, because that's what the hash says.

IDquizchain2/2020 / 202019-05-28

Puzzle / quizchain2

20

bitcoinp2pkh solved

Record

bitcoinPuzzle({
  address: p2pkh("1FKbrfG7xgfY…sWrbZsFt", "9d165843464f…5093c8ad"),
  status: Status.Solved,
  key: wif("Kz3J4BtaGup2…NSuhWaWe").entropy("497f112e67d5…2fe6acf8", source("https://www.…lock_20/")).derived(),
})

Prize: 0.007 BTC
Key material: wif, derived from the recipe
Verification: verified
Solved: 2019-05-28 · 2h 52m

tx 2

Trail: Explorerblockstream.info; Sourcereddit.com/r/Grycoin/comments/btveri/7_mbtc_quizchain2_block_20; Tryquizchain2/20 in the playground

Address: 1FKbrfG7xgfYKVx9U9o3H9CViXsWrbZsFt

hash160 9d165843464fa1da840d9a287f2a59a35093c8ad

Balance

asking the explorer

Key

public key · compressed: 0347a62e632fc1a03af4e11506def7b3ab5ee70ba41c36f2863c1ba9d2fc8cf392
WIF: Kz3J4BtaGup2TZTxH9h8y5wWCUmxL5KGsx6R9P8DY3z1NSuhWaWe
entropy hash: 497f112e67d5e049ee7f9a6d2fe6acf8
entropy source: MD5 of the two words

Transactions

funding2019-05-280.007 BTC4e96917f57…ec2809
claim2019-05-280.00659066 BTC20379ff257…cbd7ad

Hints

undated
officialQuestion : 1AndrewYangForPresident2o2o6zmPzd
Sourcereddit.com/r/Grycoin/comments/btveri/7_mbtc_quizchain2_block_20
Published answer
Solution was just "burn address".
Sourcereddit.com/r/Grycoin/comments/btveri/7_mbtc_quizchain2_block_20
undated
officialFormat: [solution]
Sourcereddit.com/r/Grycoin/comments/btveri/7_mbtc_quizchain2_block_20
Published answer
The solution is simply "burn address".
Sourcereddit.com/r/Grycoin/comments/btveri/comment/ep33zng
undated
officialFirst three digits of MD5 hash are 497.
Sourcereddit.com/r/Grycoin/comments/btveri/7_mbtc_quizchain2_block_20