An important difference is that the supply does not depend on the amount of mining. In general changing total miner hashpower does not change how many bitcoins are created over the long term. Difficulty The Computationally-Difficult Problem Mining a block is difficult because the SHA hash of a block’s header must be lower than or equal to the target in order for the block to be accepted by the network. This problem can be simplified for explanation purposes: The hash of a block must start with a certain number of zeros.

The probability of calculating a hash that starts with many zeros is very low, therefore many attempts must be made. In order to generate a new hash each round, a nonce is incremented.

See Proof of work for more information. The Difficulty Metric The difficulty is the measure of how difficult it is to find a new block compared to the easiest it can ever be. The rate is recalculated every 2, blocks to a value such that the previous 2, blocks would have been generated in exactly one fortnight two weeks had everyone been mining at this difficulty.

### How Bitcoin Mining Works

This is expected yield, on average, one block every ten minutes. As more miners join, the rate of block creation increases. As the rate of block generation increases, the difficulty rises to compensate, which has a balancing of effect due to reducing the rate of block-creation.

Any blocks released by malicious miners that do not meet the required difficulty target will simply be rejected by the other participants in the network.

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Reward When a block is discovered, the discoverer may award themselves a certain number of bitcoins, which is agreed-upon by everyone in the network. Currently this bounty is Miners are paid any transaction fees as well as a “subsidy” of newly created coins. This both serves the purpose of disseminating new coins in a decentralized manner as well as motivating people to provide security for the system. Bitcoin mining is so called because it resembles the mining of other commodities: What is Proof of Work?

A proof of work is a piece of data which was difficult costly, time-consuming to produce so as to satisfy certain requirements.

### Importance of Bitcoin Mining Software

It must be trivial to check whether data satisfies said requirements. Producing a proof of work can be a random process with low probability, so that a lot of trial and error is required on average before a valid proof of work is generated. Bitcoin uses the Hashcash proof of work. What is Bitcoin Mining Difficulty?

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The Computationally-Difficult Problem Bitcoin mining a block is difficult because the SHA hash of a block’s header must be lower than or equal to the target in order for the block to be accepted by the network.