BITCOIN MINING DIFFICULTY

What is the setting measuring?

Bitcoin mining difficulty is the setting that controls how hard it is for miners, the computers that secure Bitcoin, to find a valid block. Miners repeatedly try possible answers to a mathematical puzzle. Raising difficulty means they need more attempts on average; lowering it means fewer.

Why does it move in steps?

Bitcoin adjusts difficulty every 2,016 blocks. The adjustment compares the time those blocks took with a target of about two weeks, one block every ten minutes. If they arrived too quickly, the next puzzle becomes harder. If they arrived too slowly, it becomes easier. In between, the setting does not move.

What do the large numbers mean?

Difficulty is measured against Bitcoin’s original mining setting of 1, not as a count of machines or an amount of energy. A setting of 100 T is 100 trillion times the original. k means thousand, M million, B billion and T trillion. The chart gives equal space to equal percentage changes, so the setting of 1 in 2009 and today’s fit on one chart.

Why has it climbed so far?

Because the mining industry kept growing: better machines, cheaper electricity and more money invested, year after year. Difficulty has risen in 356 of the 465 changes in the daily record, from 1 in 2009 to its record of 155.97 T on 29 Oct 2025.

Why does it fall?

A single fall is usually routine: machines taken offline for repairs or upgrades, or a seasonal change in the cost or supply of electricity. The largest falls came when a lot of mining power switched off at once. The largest in the daily record was a fall of 27.94% on 3 Jul 2021, after China banned Bitcoin mining. The 2018 downturn brought a fall of 15.13% on 3 Dec 2018. Each halving so far, when the reward for each block was cut in half, was followed within about a month by a fall, as machines that no longer paid their way were switched off.

What does a run of adjustments say?

A long run of rises shows new mining power keeps joining, which keeps the network well protected. A string of falls shows miners are struggling: blocks kept arriving slower than the ten-minute target because machines were switched off. Some runs of falls came close to low points for Bitcoin’s price: three of the seven runs of three or more falls ended within a month of Bitcoin’s lowest price in the six months either side, in November 2011, December 2018 and July 2021. The other four did not, so a run of falls is not a price signal.

Does harder mining mean a higher price?

No. The setting follows how quickly blocks were found. Miners react to electricity costs, equipment, Bitcoin’s price and other conditions. Difficulty reflects the combined result with a delay; it is not a direct measure of profit or a signal that price must rise.

How does it relate to mining power?

Mining power is the computing power miners point at Bitcoin, estimated every day. Difficulty follows it with a delay: each adjustment resets the setting so that the power of the past two weeks would have found one block every ten minutes. Open Mining Power.