# How does Bitcoin mining work?

How does Bitcoin mining work? | Bitcoin is a sovereign digital currency. It is not directly linked to any real-world money, and any government does not control it. However, people can use it to buy real-world goods at significant retailers like Overstock.com or Expedia.

To process these transactions securely, entities called “miners” compete to solve mathematically complex problems. A miner who solves the problem successfully receives 6.25 bitcoins as a reward.

This is not only a reward for the miner’s efforts, but it is also how new bitcoins are created and put into circulation.

## How Bitcoin Mining Works

The blockchain is the foundation of all mining. This online, decentralized ledger records transactions across a network. A “block” is a group of approved transactions. These blocks are tied together to create a “chain,” hence the term “blockchain.

A miner in the Bitcoin network has one goal: to add blocks to the blockchain using complex mathematical problems. This requires substantial computational and electrical power. Although many miners are competing to add each block, only the one who solves the problem will add that block (along with all approved transactions) to the blockchain. The reward for this miner is 6.25 bitcoins. However, the block reward is roughly cut in half every four years.

## Mining as verification transactions

Two things must happen for bitcoin miners who verify transactions to earn bitcoin. They must first prove 1 megabyte (MB) worth of transactions. These transactions can be as small as one transaction, but they are often many thousand depending on how much data each transaction stores more about bitcoinxxo.com

The second problem is that miners must solve complex mathematical problems to add transactions to the blockchain. This is also known as proof of work. What they’re doing is trying to come up with a 64-digit hexadecimal number, called a “hash,” that is less than or equal to the target hash. A miner’s computer generates hashes at various rates, such as megahashes per minute (MH/s), gigahashessecond (GH/s), and terahashessecond (TH/s). Depending on the unit, they guess all 64-digit numbers possible until they find a solution. It’s a gamble.

The difficulty level of the most recent block as of August 2020 is more than 16 trillion. The chance that a computer will produce a hash lower than the target is one in 16 trillion. This means that you have a 44,500-fold chance of winning the Powerball jackpot by buying a single ticket. Mining computer systems can generate many possible hash options. However, mining bitcoin for profit requires a lot of energy and complex computing operations.

The difficulty level is adjusted approximately every two weeks or every 2016 block. This is to keep mining simple.