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In other words, it is a bet. .

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

The reverse is also correct. If computational power has been taken from this network, the problem adjusts downward to make mining simpler. .

"Say I tell three friends 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 simply must be the first person to figure any number that's less than or equal to this number I am thinking of.

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"Let us 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 guesses 12, then they have both technically came at viable answers, since 16<19 and 12<19. There is no'extra credit' for Friend B, even though B's answer was nearer to the target answer of 19. .

"Now imagine that I present the'guess what number I am thinking of' question, but I am not asking just 3 friends, and I am not thinking of a number between 1 and 100. Instead, I am 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 quite difficult to guess the right 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 have to think of the right hash, they also have to be the first to do it.

Because bitcoin mining is essentially guesswork, arriving at the right answer before another miner has almost everything to do with how fast your computer can produce hashes. Just a decade ago, bitcoin miners could be performed competitively on normal desktop computers. Over time, however, miners realized that graphics cards commonly used for video games tend to be more effective at mining than desktops and graphics processing units (GPU) came to dominate the match.

These can run from $500 into the tens of thousands. .

Nowadays, bitcoin mining is so aggressive that it can only be done profitably with all the latest 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 seldom enough to compete with exactly what miners call"mining pools" .

An mining pool is a group of miners that combine their computing power and split the mined bitcoin between participants. A disproportionately high number of cubes 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 goal, not a rule.

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The bitcoin network can process check this site out about seven transactions per second, with transactions being logged in the blockchain each 10 minutes. As 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 dilemma at the heart of the bitcoin protocol is known as scaling. Even though bitcoin miners generally agree that something has to be done in order to address scaling, there is less consensus regarding how do it. In the time of writing, there are two major solutions to this scaling problem, either (1) to decrease the amount of data needed to confirm each block or (2) to increase the number of transactions that each block can save.

Solution 2 would deal with scaling by allowing for much more information to be processed every 10 minutes. .

In July 2017, bitcoin miners and mining companies representing approximately 80% to 90% of the networks computing electricity voted to incorporate a program that would reduce the amount of data needed to confirm each block. That is, they went with Solution 1.

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The program which miners voted to increase the bitcoin protocol is called a segregated witness, or SegWit. This expression is an amalgamation of Segregated, original site meaning to separate, and Witness, which describes signatures on a bitcoin transaction. Segregated Witness, then, means to separate transaction signatures from a block and attach them within an extended block.