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In other words, it's a gamble. .
The opposite is also true. If computational power has been taken off of the network, the problem adjusts downward to make mining simpler. .
"Say I tell three friends that I'm thinking about 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 specific number, they just have to be the very first person to figure any number that is less than or equal to this number I'm thinking of.
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"Let's say I'm thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C supposes 12, then they've both theoretically arrived at workable answers, since 16<19 and 12<19. There's no'extra credit' for Friend B, even though B's answer was closer to the goal answer of 19. .
"Now imagine that I pose the'guess what number I'm thinking of' question, but I am not asking only three friends, and I'm not thinking of a number between 1 and 100. Rather, I am asking millions of prospective miners and I am thinking of a 64-digit hexadecimal number. Now you see that it's going to be quite hard to guess the right answer." .
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If 1 in 7 trillion doesn't sound difficult enough as is, here is the catch to the grab. Not only do bitcoin miners need to think of the right hash, they also must be the first to perform it.
Because bitcoin mining is essentially guesswork, arriving at the ideal answer before another miner has almost everything to do with how fast your computer can produce hashes. Just a decade ago, bitcoin miners can be carried out competitively on normal desktop computers. As time passes, however, miners recognized that pictures cards commonly used for video games tend to be more capable of mining than desktops and graphics processing units (GPU) came to dominate the match.
These can run from $500 into the tens of thousands. .
Today, bitcoin mining is so competitive it can only be done profitably using the most up-to-date ASICs. When using desktop computers, GPUs, or elderly versions of ASICs, the expense of energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one computer is rarely enough to compete with exactly what miners call"mining pools" .
An mining pool is a group of miners that combine their computing ability and divide the mined bitcoin between participants. A disproportionately large number of blocks are mined by pools rather than by individual miners. In July 2017, mining pools and companies represented approximately 80% to 90 percent of bitcoin computing power. .
Between 1 in 7 trillion chances, scaling difficulty levels, and also the huge network of consumers verifying transactions, one block of transactions is confirmed roughly every 10 minutes. But its important to remember that 10 minutes is a target, 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 consumers 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 issue at the center of the bitcoin protocol is known as scaling. Even though bitcoin miners generally agree that something must be done to deal with scaling, there is less consensus about how can it. In the time of writing, there are two major solutions to this scaling problem, either (1) to decrease the amount of information needed to verify each block or (2) to increase the number of transactions that every block can store.
Solution 2 will deal with scaling by allowing for much 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 electricity required to incorporate a program that would 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 increase the bitcoin protocol is called a segregated witness, or SegWit. This term is an amalgamation of Segregated, meaning to separate, and Witness, which refers to signatures on a bitcoin transaction. Segregated Witness, then, means to visit this website separate transaction signatures from a block and attach them within an extended block.