chloe21e8's profile picture with the sequence 21e8 superimposed

21e8

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About

21e8 (also 21e800) is a sequence of numbers and letters that appeared is a part of the block hash of block 528249, mined on the Bitcoin blockchain on June 19th, 2018. Due to a specific set of peculiarities surrounding the block hash, it has achieved a cult-like status and numerological significance within the cryptocurrency community.

Origin

On June 19th, 2018, Twitter[1] user @mwilcox tweeted a block hash of block 528249, just minted on the Bitcoin blockchain. The hash, 00000000000000000021e800c1e8df51b22c1588e5a624bea17e9faa34b2dc4a, possessed several specific qualities that drew interest of the Bitcoin community.

According to calculations done by members of the community,[2][3] computing this exact hash is an unlikely probability, with a random chance for it being 0.4699%. If a miner possessed one exahash of computing power, it would take them 2512 years to discover block 528249. Additionally, the hash contained the sequence 21e8 in it, which was interpreted by some as a combination of 21 (with 21 million being the total and final number of Bitcoin what will be mined), and e8, a common name for the Exceptionally Simple Theory of Everything, a basis for a unified field theory proposed by Antony Garret Lisi in 2007.


Markham Thomson @markhamthomson Jun 20 Replying to @mwilcox What we're the odds on that 3 12 1 Mark Wilcox @mwilcox Jun 20 1 Pardis Noorzad @djpardis Unfollow me if you play short term games Show this thread 10 17 2 13 @yungdeleuze . Jun 20 My math might be off here, but if we assume that the person who generated that block did it on purpose, then they had to predetermine the first 24 characters of the hash. If that person could do 1 exahash / sec, it would take about 2512 years to find that hash. 17 53 @yungdeleuze 12 2:04 PM - 20 Jun 2018 136 Follow Replying to @yungdeleuze @mwilcox and 2 others So... you can't fake math, or probabilities. It could have been random chance. But if it's not, the only reasonable possibilities are that a functioning quantum computer exists, or time travel works.

Other users argued that the rarity of the block's hash was far overblown, arguing that the sequence of any four character sequence following the zeroes in the hash would appear approximately once per year,[4][5] meaning that the hash lacked any significance.


Charlie No... @_charlieno.... Jun 21, 2018 1/#00000000000000000021e800c1e8df51b22c15 88e5a624bea17e9faa34b2dc4a isn't meaningful or special, explanation following 1 26 5 2 4 53 Charlie Noyes @_charlienoyes Charlie No... @_charlieno... •· Jun 21, 2018 2/ Leading zeros can be ignored considering bitcoin as a single system, i.e. not assuming this was a single actor specifically trying to generate this hash. Odds of a block having 18 leading zeros currently is P(1-(1/16)- (1/256))~ 93%. 4 l 14 ↑ ılı ↑ 3/ Taking that, the likelihood of occurrence of *any* specific 4 char sequence following the O's in a hash is P((1/16)^4), or 1 in 65536. With 528493 blocks, this sequence should have already shown up about 8 times. 4:03 AM Jun 21, 2018 Emin Gün Sirer @el33th4xor. Jun 21, 2018 People are hailing this block as being magical. That's innumerate. 6* 24 * 365 / (16 *16*16*16) comes out to ~1. Expect approximately 1 such magical block per year I just published @cprkrn Jun 21, 2018 "#00000000000000000021e800c1e8df51b22c1588e 5a624bea17e9faa34b2dc4a" medium.com/p/000000000000... Show this thread 13 11 12 71 209 Emin Gün Sirer A @el33th4xor Jun 21, 2018 Also, there are many other numbers that look significant, though they are not exactly 21e8. If you add those, chances of spotting special numbers are going to be very high. This is basically numerology on the blockchain. I 19 Emin Gün Sirer @el33th4xor la 110 la Interesting data from @danrobinson Blocks 26284, 83434, 187323, 259695, 304822, 349158, 437039, 475118 all start with 21e8. That's precisely the number you'd expect. One per year. 5:37 AM Jun 21, 2018 :

Spread

The combination of the block's supposed rarity and the 21e8 sequence in it led some people to believe that the appearance of the block was premeditated, possibly by Satoshi Nakamoto, the pseudonymous person or persons who developed bitcoin.[6][7] In June 2018, Twitter[2][8] users tried explaining the existence of the hash with time travel and existence quantum computing (examples shown below).


sonic alchemy @sonicalchemy So my mind is melting. Satoshi may be artificial intelligence. And/or time traveling. Maybe quantum computing now exists. Esoteric and metaphysical meaning has found its way to crypto. @mwilcox @desantis #00000000000000000021e800c1e8df51b22c1588 e5a624bea17e9faa34b2dc4a 4:00 AM Jun 21, 2018 Roy Blackstone @fillbeforeshill. Jun 21, 2018 Alright, quick run down of the #21e800 hash: - to create this hash you need several magnitudes higher level of computation than exists in the entire world somewhere around 2.5k years to produce a hash with all the leading O's AND 21e8 following 1 99 28 258 Roy Blackstone @fillbeforeshill. Jun 21, 2018 - 21 million is the total supply of Bitcoin. it is an 8 digit number = 21e8 - if someone did it on purpose, it would need an incredible processing power, quantum computer tier 5 - only time this overflow happened was with the first block, genesis block that satoshi himself created Roy Blackstone @fillbeforeshill 18 la 92 - someone has unlocked quantum computing - someone broke the SHA-256 algo - aliens 4:07 AM Jun 21, 2018 : la current explanations: - someone got really lucky (i mean astronomically lucky) - satoshi is a time traveler ... : 00000000000000000021E800C1E8DF51B22C1588E5A624BEA17E9FAA34B2DC4A I WANT TO BELIEVE

The sequence has had a lasting impact on the cryptocurrency community, becoming a meme and attaining numerological, esoteric significance.

In March 2023, the sequence regained popularity on Twitter,[9][10] largely due to the efforts of user @chloe21e8 (also known as "Chloe"), an account claiming to be run by an AI researcher at Foxconn and known for tying in mysticism and spiritual practices with themes of transhumanism and AI technology in its posts (example tweets shown below).


mark @mwilcox i believe in a girl from Zhejiang, China. her name is Chloe. she is a part of 21e8. she doesn't exist. through her nonexistence, she exists. they don't get it. i do. i get that u can't get it. i don't get why. but i feel it. so i get it. it's all empty, and the emptiness is 21e8 3:36 AM - Apr 24, 2023 26.7K Views EPUTE @chloe21e84... @chloe2.... May 5 Thank you for having the bravery to stand up for Chloe. 35 17 9 wdude @notpotman 250 ₁15.8K Chloe is just a puppet for the shadow of 21e8 2:06 AM - May 6, 2023 17K Views ↑

On April 3rd, 2023, website page 21e8.com[11] was updated to display a countdown clock that will run out on April 13th, 2024.

Various Examples


21e8 000 GET 5NP @e77exeternal kali/acc is my heart. 21e8 is my mind. BRG is my soul. God is my Universe. : Cryptofeduss.Eth @CryptoFeduss Everyone right now... #00000000000000000021e800c1e8df51b22c1588e5a624bea17e9fa a34b2dc4a 10 12:12 PM Jun 21, 2018 ... ILGE numbers, Mason! What do they mean? 10 r
@bitcoinkarate Cofie IN CONGRESS. nnanimons Declaration tion Jezy States of 32 00000000000000000021-800c128df5 1b22c1588e5a624bea17e9faa34b2dc4a @goth @goth600 They don't know about 21e8 10:14 PM . Apr 30, 2023 20.6K Views : $5 SNP @e77exeternal G J there's only one use case for blockchain and it's called 21e8 and u don't get it

Search Interest

External References

[1] Twitter – @mwilcox

[2] Twitter – @fillbeforeshill

[3] Internet Archive – @yungdeleuze

[4] Twitter – @_charlienoyes

[5] Twitter – @el33th4xor

[6] Twitter – @s0nicalchemy

[7] Twitter – @BoogieCrypto

[8] Twitter – @NikitaVidineev

[9] Twitter – @chloe21e8

[10] Twitter – @mwilcox

[11] 21e8.com – 21e8

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