Difficulty
Bitcoin mining difficulty — the self-adjusting target that holds block times near ten minutes — with all-time-high context and history.
Difficulty stands at 125.8 T, 19.3% below its all-time high. It re-adjusts about every two weeks and marks a floor on the honest mining effort behind each block — not the dollar cost to attack the chain.
History
Exact protocol value from mempool.space (public/btc-difficulty.json), as of 2026-08-31. It only moves once per ~2-week adjustment; not live.
How it's computed
Difficulty is an exact protocol value carried in every block header. It re-adjusts every 2,016 blocks (~two weeks) so that, at the epoch's hashrate, blocks are found about every ten minutes. We read the latest value and the history from mempool.space (a weekly snapshot). Shown in T — the raw difficulty divided by one trillion.
Why there's no band
No band. These readings — difficulty, hashrate, hashprice, and the production-cost floor — are level, estimate, and model readings; there's no valuation ceiling to place them against, so unlike Mayer or Puell there's no cheap/fair/expensive axis. Each carries a value and an as-of date, never a band, and never the live cyan badge.