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In other words, it's a gamble. .

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The difficulty level of the most recent block at the time of writing is about 7,184,404,942,701. That is, the chance of a computer producing a hash below the goal is just 1 in 7,184,404,942,701 less than 1 in 7 trillion. That level is corrected every 2016 cubes, or about every 2 weeks, with the aim of keeping rates of mining constant.

The reverse is also correct. If computational power has been taken off of 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 just must be the first person to figure any number that's less than or equal to this number I'm thinking of.

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"Let's say I am thinking about the number 19. If Friend A guesses 21they shed because 21>19. If Friend B guesses 16 and Friend C guesses 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 I present the'guess what number I am thinking of' question, however I am not asking only 3 friends, and I'm not thinking of a number between 1 and 100. Rather, I am asking millions of would-be miners and I'm thinking of a 64-digit hexadecimal number. Now you see that it's going to be extremely hard to guess the ideal answer." .

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If 1 in 7 trillion doesn't sound difficult enough as is, here's the catch to the catch. Not only do bitcoin miners need to think of the right hash, but they also have to be the first to perform it.

Because bitcoin mining is essentially guesswork, arriving at the ideal 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 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 to the tens of thousands. .

Today, bitcoin mining is so aggressive it can only be done profitably with the most up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the cost of energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one computer is rarely enough to compete with what what miners call"mining pools" .

An mining pool is a group of miners that combine their computing ability and split 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 the massive 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 pop over to these guys being logged in the blockchain each 10 minutes. As the network of bitcoin consumers 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 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 can it. At the time of writing, there are two major solutions to this scaling problem, either (1) to lower the amount of information needed to confirm each block or (2) to increase the number of transactions that every block can store.

Solution 2 will 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 percent of the networks computing power voted to incorporate a program that will reduce the amount of information needed to confirm each block. That is, they went with Solution 1.

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The app that miners voted to add to the bitcoin protocol is called a segregated witness, or SegWit. This expression 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 from a block and join them as an extended block.

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