- The network observes block timing
- Difficulty changes the work target
- Why the mechanism matters
The network observes block timing
Bitcoin examines how long the previous 2,016 blocks took to mine. That period is roughly two weeks when blocks arrive near the intended average.
If the period was completed too quickly, difficulty can increase. If it took too long, difficulty can decrease.
Difficulty changes the work target
A higher difficulty means miners must perform more attempts on average before finding a valid block. A lower difficulty reduces that expected amount of work.
The adjustment does not select winners or assign mining rewards. It changes the network-wide target used to evaluate block hashes.
Why the mechanism matters
Without adjustment, large changes in total hashrate could make blocks arrive far faster or slower for extended periods.
Difficulty helps Bitcoin maintain a more predictable issuance and confirmation rhythm as mining participation changes.
Common questions about this topic
How often does Bitcoin mining difficulty adjust?
Bitcoin evaluates difficulty after each 2,016-block period, which is approximately two weeks when blocks arrive near the intended average.
Why does Bitcoin change mining difficulty?
The adjustment helps keep block production more consistent when total network hashrate rises or falls.
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