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4c414876be9043da4538386be9a03df6 from https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F (MD5 of the solution)\nstarted: 2019-07-28 00:35:31\nsolved: 2019-07-28 01:31:44 (56m)\ntransactions: 2\n\tfunding\t2019-07-28 00:35:31\t0.007 BTC\t75af636c49ba8127d02d79a36576e33bf248ceeb5bfd2bb04e2c0c6f4f4d493a\n\tclaim\t2019-07-28 01:31:44\t0.00691955 BTC\t9509345e67024aff45b6e71988707fa86543e022a101bf46c2a61a680e2b315f\nclaim: https:\u002F\u002Fblockstream.info\u002Ftx\u002F9509345e67024aff45b6e71988707fa86543e022a101bf46c2a61a680e2b315f\ntechniques: 1\n\tmd5-to-bip39-entropy\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\nhints: 7\n\tofficial\t-\tQuestion: When is this?\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\tanswer: Update: As noted by winner below, solution to this block was \"Still 21st Century\".\tanswer source: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\tanswer date: 2019-07-28\n\tofficial\t-\tFormat: [solution]\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\tanswer: Still 21st Century\tanswer source: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fev9nhlc\u002F\tanswer date: 2019-07-28\n\tofficial\t-\tFirst three digits of MD5 hash are 4c4.\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\n\tofficial\t-\tBut when I started up again, the first thing I wrote in my Twitter feed is the question for this block 1 of the Grycoin chain.\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\n\tofficial\t-\tThere may be a hint in this block for some of the unsolved quizchain big blocks.\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\n\tofficial\t-\tIt is for 77, but you will not see it if you let a script solve the block.\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fevaigpj\u002F\n\tofficial\t-\tAnd no, block 21 is not a hint for the format.\tsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fevaigpj\u002F\nexplorer: https:\u002F\u002Fblockstream.info\u002Faddress\u002F18EpYz5qB3XoxZWouJF3KdEp3E2nfv9FgP\nsource: https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\nfiles: 0 files, 3 archived sources; puzzles_assets lists them and reads one by its path","1",false,true,[513,516,519],{"label":514,"value":515,"mono":511},"WIF","L1K8wVaq5WYH184dcCBeHZEe3cQYkWnJz778LW2NeYq3QCtGsRyt",{"label":517,"value":518,"mono":511},"entropy hash","4c414876be9043da4538386be9a03df6",{"label":520,"value":521,"mono":510,"href":506},"entropy source","MD5 of the solution",[523,527],{"type":524,"txid":525,"date":497,"amount":495,"url":526},"funding","75af636c49ba8127d02d79a36576e33bf248ceeb5bfd2bb04e2c0c6f4f4d493a","https:\u002F\u002Fblockstream.info\u002Ftx\u002F75af636c49ba8127d02d79a36576e33bf248ceeb5bfd2bb04e2c0c6f4f4d493a",{"type":528,"txid":529,"date":498,"amount":530,"url":531},"claim","9509345e67024aff45b6e71988707fa86543e022a101bf46c2a61a680e2b315f","0.00691955 BTC","https:\u002F\u002Fblockstream.info\u002Ftx\u002F9509345e67024aff45b6e71988707fa86543e022a101bf46c2a61a680e2b315f",[],[534,540,545,547,549,551,554],{"kind":535,"text":536,"source":506,"answer":537,"shared":510},"official","Question: When is this?",{"text":538,"source":506,"date":539},"Update: As noted by winner below, solution to this block was \"Still 21st Century\".","2019-07-28",{"kind":535,"text":541,"source":506,"answer":542,"shared":510},"Format: [solution]",{"text":543,"source":544,"date":539},"Still 21st Century","https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fev9nhlc\u002F",{"kind":535,"text":546,"source":506,"shared":510},"First three digits of MD5 hash are 4c4.",{"kind":535,"text":548,"source":506,"shared":510},"But when I started up again, the first thing I wrote in my Twitter feed is the question for this block 1 of the Grycoin chain.",{"kind":535,"text":550,"source":506,"shared":510},"There may be a hint in this block for some of the unsolved quizchain big blocks.",{"kind":535,"text":552,"source":553,"shared":510},"It is for 77, but you will not see it if you let a script solve the block.","https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fevaigpj\u002F",{"kind":535,"text":555,"source":553,"shared":510},"And no, block 21 is not a hint for the format.",[557],{"name":558,"source":506,"scope":559},"md5-to-bip39-entropy","puzzle","{\n  \"id\": \"grycoin\u002F1\",\n  \"chain\": \"bitcoin\",\n  \"address\": {\n    \"value\": \"18EpYz5qB3XoxZWouJF3KdEp3E2nfv9FgP\",\n    \"kind\": \"p2pkh\",\n    \"hash160\": \"4f65fb60964a26ba304d5e854b4806f93fe58d3e\"\n  },\n  \"status\": \"solved\",\n  \"pubkey\": {\n    \"value\": \"0358a499b712f0e7739fc53e82c84b87cb946298c9fd1fb5649906fa90f27e2ba9\",\n    \"format\": \"compressed\"\n  },\n  \"key\": {\n    \"wif\": {\n      \"decrypted\": \"L1K8wVaq5WYH184dcCBeHZEe3cQYkWnJz778LW2NeYq3QCtGsRyt\"\n    },\n    \"seed\": {\n      \"entropy\": {\n        \"hash\": \"4c414876be9043da4538386be9a03df6\",\n        \"source\": {\n          \"url\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\",\n          \"description\": \"MD5 of the solution\"\n        }\n      }\n    },\n    \"derived\": true\n  },\n  \"prize\": 0.007,\n  \"start_date\": \"2019-07-28 00:35:31\",\n  \"solve_date\": \"2019-07-28 01:31:44\",\n  \"solve_time\": 3373,\n  \"source_url\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\",\n  \"transactions\": [\n    {\n      \"tx_type\": \"funding\",\n      \"txid\": \"75af636c49ba8127d02d79a36576e33bf248ceeb5bfd2bb04e2c0c6f4f4d493a\",\n      \"date\": \"2019-07-28 00:35:31\",\n      \"amount\": 0.007\n    },\n    {\n      \"tx_type\": \"claim\",\n      \"txid\": \"9509345e67024aff45b6e71988707fa86543e022a101bf46c2a61a680e2b315f\",\n      \"date\": \"2019-07-28 01:31:44\",\n      \"amount\": 0.00691955\n    }\n  ],\n  \"hints\": [\n    {\n      \"kind\": \"official\",\n      \"text\": \"Question: When is this?\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\",\n      \"answer\": {\n        \"text\": \"Update: As noted by winner below, solution to this block was \\\"Still 21st Century\\\".\",\n        \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\",\n        \"date\": \"2019-07-28\"\n      }\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"Format: [solution]\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\",\n      \"answer\": {\n        \"text\": \"Still 21st Century\",\n        \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fev9nhlc\u002F\",\n        \"date\": \"2019-07-28\"\n      }\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"First three digits of MD5 hash are 4c4.\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"But when I started up again, the first thing I wrote in my Twitter feed is the question for this block 1 of the Grycoin chain.\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"There may be a hint in this block for some of the unsolved quizchain big blocks.\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"It is for 77, but you will not see it if you let a script solve the block.\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fevaigpj\u002F\"\n    },\n    {\n      \"kind\": \"official\",\n      \"text\": \"And no, block 21 is not a hint for the format.\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002Fcomment\u002Fevaigpj\u002F\"\n    }\n  ],\n  \"techniques\": [\n    {\n      \"name\": \"md5-to-bip39-entropy\",\n      \"source\": \"https:\u002F\u002Fwww.reddit.com\u002Fr\u002FGrycoin\u002Fcomments\u002Fcivj2n\u002F7_mbtc_grycoin_chain_block_1\u002F\"\n    }\n  ]\n}",[562,568,575],{"kind":563,"label":563,"path":564,"url":565,"format":566,"screenshot":567,"origin":506,"date":539},"source","assets\u002Fsources\u002Fgrycoin\u002Faoinakamoto-2019-07-28-civj2n.md","\u002Fassets\u002Fsources\u002Fgrycoin\u002Faoinakamoto-2019-07-28-civj2n.md","markdown","\u002Fassets\u002Fsources\u002Fgrycoin\u002Faoinakamoto-2019-07-28-civj2n.png",{"kind":563,"label":569,"path":570,"url":571,"format":566,"screenshot":572,"origin":573,"date":574},"author's post","assets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-05-b9l37o.md","\u002Fassets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-05-b9l37o.md","\u002Fassets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-05-b9l37o.png","https:\u002F\u002Fwww.reddit.com\u002Fr\u002FBitcoin\u002Fcomments\u002Fb9l37o\u002F","2019-04-05",{"kind":563,"label":569,"path":576,"url":577,"format":566,"screenshot":578,"origin":579,"date":580},"assets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-10-ekjcc1k.md","\u002Fassets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-10-ekjcc1k.md","\u002Fassets\u002Fsources\u002Fsatoshi-birthday-quiz\u002Faoinakamoto-2019-04-10-ekjcc1k.png","https:\u002F\u002Fwww.reddit.com\u002Fr\u002Fbitcoinpuzzles\u002Fcomments\u002Fbbij0e\u002Fmeidum_7_mbtc_quizchain_block_18\u002Fekjcc1k\u002F","2019-04-10","grycoin\u002F2",1,{"id":584,"title":509,"body":585,"description":645,"extension":650,"meta":651,"navigation":511,"path":652,"seo":653,"stem":488,"__hash__":654},"stories\u002Fgrycoin\u002F1.md",{"type":586,"value":587,"toc":644},"minimark",[588,593,609,612,616,628,634,637,641],[589,590,592],"h2",{"id":591},"when-is-this","When is this?",[594,595,596,597,600,601,604,605,608],"p",{},"July 28, 2019. The Quizchain is over, the author says, and the Grycoin chain starts. New name, smaller blocks, 7 mBTC each. The question is ",[598,599,592],"code",{}," Format ",[598,602,603],{},"[solution]",", no TOMI field, digits ",[598,606,607],{},"4c4",".",[594,610,611],{},"Where did the question come from? The author's Twitter feed. It was the first thing posted there after the comeback, and maybe someone saw it coming.",[589,613,615],{"id":614},"gone-before-the-post","Gone before the post",[594,617,618,619,623,624,627],{},"Someone did. The funding confirmed at ",[620,621,622],"strong",{},"00:35:31 UTC",", the claim at ",[620,625,626],{},"01:31:44",". The post went up at 12:58 UTC. So by the time anyone could read the question, the coins were long gone.",[594,629,630,631,633],{},"The answer is ",[598,632,543],{},". u\u002FLiaVl spelled it out in the thread for everyone who missed the race. \"Maybe was a bit too easy for scripting wizards this time since I did not use a TOMI field\", wrote the author.",[594,635,636],{},"A player suggested a fix in a private message. Add some random info to the solution and reveal it only with the post. Simple, right? Should've been there from the start.",[589,638,640],{"id":639},"a-hint-for-77","A hint for 77",[594,642,643],{},"The author says the block's real job is a hint for block 77 of the first run. You don't get it if a script solved the block for you. And block 21? \"No, block 21 is not a hint for the format.\" Good to know.",{"title":645,"searchDepth":507,"depth":507,"links":646},"",[647,648,649],{"id":591,"depth":507,"text":592},{"id":614,"depth":507,"text":615},{"id":639,"depth":507,"text":640},"md",{},"\u002Fgrycoin\u002F1",{"description":645},"HYliozn9CztquLreVQjo3hcnXx9KcRYF3D-lYmB5ra4",1791479590086]