Mining Difficulty

The protocol raises or lowers difficulty on a fixed schedule, every 2016 blocks on Bitcoin, so that blocks continue to arrive near the target interval no matter how much hardware is competing. If miners add capacity, difficulty rises at the next adjustment; if they leave, it falls. It is a dimensionless protocol parameter, not a market price.

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Difficulty is a lagging response to hash rate rather than an independent signal: it changes only at scheduled adjustments and therefore reports conditions that have already passed, which makes it unsuitable for detecting a change in mining activity quickly. The absolute value is meaningless across chains because each proof-of-work algorithm defines its own units, so difficulty on one chain cannot be compared with difficulty on another. It says nothing about miner economics, which depend on the coin price, energy cost and hardware efficiency; difficulty can rise steadily while miner margins compress. It is undefined for proof-of-stake networks.

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A higher value means more work is required on average to produce a valid block and a lower value means less. Because it adjusts on a schedule, it describes the recent past rather than current conditions.