Why? Because the block hash assigned to block #528249 is 00000000000000000021e800c1e8df51b22c1588e5a624bea17e9faa34b2dc4a, and, according to calculations, it is very unlikely for a miner to compute this hash.
Block #528249 is similar to the genesis block signed by Satoshi Nakamoto - the anonymous creator of Bitcoin.
According to a crypto community member that goes by the alias "Coop-soup," if a Bitcoin miner using a CPU in the genesis block era worked toward solving the genesis block for six days straight, they would have about a 17 percent chance of solving the block.
According to the genesis block scriptsig on Coinbase, it only took the miner who solved the genesis block about 4.2 minutes to sign the block.
The striking resemblance in the mathematical likelihood of both the genesis block and block 528249 taking place, and the fact that Satoshi Nakamoto did actually sign the genesis block, lead some to believe that block #528249 was also the work of Satoshi Nakamoto.
A quantum computer would be able to provide answers to the cryptographic proof at incredible speeds, cutting down the time it takes to solve the block from 2500 years, to an average of 10 minutes it takes to sign a block.
Although it is not very likely for a block to have 21e800 as its 19-24th characters, there is still a chance that it can happen.
Some individuals believe block #528249 was not just a coincidence or predetermined, but rather a hidden message on the Bitcoin blockchain.
At this point in time, it is tough to say why block #528249 has a difficulty of 18 - which means it begins with 18 zeros - and is followed by 21e800.
It's also possible that 21e800 was a predetermined block from an individual on the Bitcoin network who is more savvy than the rest of the community.
What Is That Mysterious About the Bitcoin Block Hash 21E800
Published on Jun 25, 2018
by Cointele | Published on Coinage
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