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In other words, it's a gamble. .
The opposite is also true. If computational power is taken off of this network, the problem adjusts downward to earn mining simpler. .
"Say I tell three friends that I'm thinking of a number between 1 and 100, and I write that number on a piece of paper and seal it in an envelope. My friends don't need to guess the exact number, they just have to be the first person to figure any number that is less than or equal to the number I'm thinking of.
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"Let's say I am thinking about the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they have both technically came at workable answers, because 16<19 and 12<19. There is no'extra credit' for Friend B, even though B's answer was closer to the target answer of 19. .
"Now imagine I present the'imagine what number I am thinking of' question, however I am not asking just three friends, and I'm not thinking of a number between 1 and 100. Rather, I am asking millions of would-be miners and I am thinking of a 64-digit hexadecimal number. Now you see that it is going to be extremely difficult to guess the right answer." .
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If 1 in 7 trillion doesn't sound difficult enough as is, here is the grab to the catch. Not only do bitcoin miners have to think of the ideal hash, they also have to be the first to perform it.
Since bitcoin mining is essentially guesswork, arriving at the right answer before another miner has everything to do with how fast your computer can create hashes. Only a decade ago, bitcoin miners could be performed competitively on normal desktops. As time passes, however, miners realized that pictures cards commonly utilized for video games were more effective at mining than desktops and graphics processing units (GPU) came to dominate the match.
These can run from $500 to the tens of thousands. .
Today, bitcoin mining is so aggressive that it can only be done profitably using all the most up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the cost of energy consumption actually surpasses the revenue generated. Even with the newest unit available, one computer is seldom enough to compete with what what miners call"mining pools" .
An mining pool is a group of miners who combine their computing ability and split the mined bitcoin between participants. A disproportionately high number of blocks are mined by pools rather than by individual miners. In July 2017, mining pools and companies represented roughly 80% to 90 percent of bitcoin computing power. .
Between 1 in 7 trillion odds, scaling difficulty levels, and also the massive network of consumers verifying transactions, one block of transactions is verified roughly every 10 minutes. However, its important to remember that 10 minutes is a target, not a rule.
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The bitcoin network can process about seven transactions per second, with transactions being logged in the blockchain every 10 minutes. Since the network of bitcoin users continues to grow, but the number of transactions made in 10 minutes will eventually exceed the number of transactions which can be processed in 10 minutes.
This issue at the center of the bitcoin Recommended Reading protocol is known as scaling. While bitcoin miners generally agree that something must be done in order to address scaling, there is less consensus about how can it. At the time of writing, there are two major solutions to this scaling problem, either (1) to lower the amount of data needed to confirm each block or (2) to increase the number of transactions that each block can store.
Solution 2 will cope with scaling by allowing for more information to be processed every 10 minutes. .
In July 2017, bitcoin miners and mining companies representing approximately 80% to 90 percent of the networks computing power required to incorporate a program that will decrease the amount of data needed to confirm each block. In other words, they went with Solution 1.
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The app which miners voted to add to the bitcoin protocol is called a segregated witness, or SegWit. This term is an amalgamation of Segregated, meaning to separate, and Witness, which describes signatures on a bitcoin transaction. Segregated Witness, then, means to separate transaction signatures out of a block and join them within an extended block.