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In other words, it's a bet. .
The opposite is also correct. If computational power is taken from the network, the problem adjusts downward to earn mining simpler. .
"Say I tell three friends I'm thinking about a number between 1 and 100, and that I write that number on a piece of paper and seal it in an envelope. My friends don't have to guess the exact number, they simply have to be the first person to guess any number that's less than or equal to this number I am thinking of.
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"Let us say I am thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both technically came at viable answers, since 16<19 and 12<19. There's no'extra credit' for Friend B, even though B's answer was closer to the target answer of 19. .
"Now imagine I present the'guess what number I am thinking of' question, however I'm not asking just three friends, and I am not thinking of a number between 1 and 100. Rather, I'm asking millions of would-be miners and I am thinking of a 64-digit hexadecimal number. Now you see that it's going to be extremely hard to guess the right answer." .
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If 1 in seven trillion doesn't sound hard enough as is, here's the catch to the grab. Not only do bitcoin miners need to think of the right hash, but they also have to be the very first to do 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 produce hashes. Only a decade ago, bitcoin miners could be performed competitively on normal desktops. As time passes, however, miners recognized that graphics cards commonly used for video games were more capable of mining than desktops and graphics processing units (GPU) came to dominate the game.
These can run from $500 into the tens of thousands. . important link
Nowadays, bitcoin mining is so competitive that it can only be done profitably using the latest up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the expense of energy consumption actually surpasses the revenue generated. Even with the newest unit available, one computer is seldom enough to compete with exactly what miners call"mining pools." .
A mining pool is a group of miners who combine their computing ability and divide the mined bitcoin between participants. A disproportionately large number of blocks are mined This Site by pools rather than by individual miners. In July 2017, mining investigate this site pools and companies represented approximately 80% to 90% of bitcoin computing power. .
Between 1 in 7 trillion chances, scaling difficulty levels, and the massive network of consumers verifying transactions, one block of transactions is confirmed roughly every 10 minutes. However, its important to keep in mind that 10 minutes is a goal, not a guideline.
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The bitcoin network can process about seven transactions per second, with transactions being logged in the blockchain each 10 minutes. Since the network of bitcoin users continues to grow, however, the number of transactions made in 10 minutes will eventually exceed the number of transactions which can be processed in 10 minutes.
This dilemma at the heart of the bitcoin protocol is known as scaling. Even though bitcoin miners generally agree that something has to be done to address scaling, there is less consensus about how do it. In the time of writing, there are two big solutions to the scaling problem, either (1) to lower the amount of data needed to confirm each block or (2) to increase the number of transactions that every block can store.
Solution 2 would deal with scaling by allowing for more information to be processed every 10 minutes. .
In July 2017, bitcoin miners and mining companies representing roughly 80% to 90% of the networks computing power voted to incorporate a program that would reduce the amount of information needed to verify each block. That is, they went with Solution 1.
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The program which miners voted to add to the bitcoin protocol is known as a segregated witness, or SegWit. This expression is an amalgamation of Segregated, meaning to different, and Witness, which describes signatures on a bitcoin transaction. Segregated Witness, then, means to separate transaction signatures out of a block and join them as an extended block.