December 11, 2021. Difficulty rose by +8.33% to 24.20T from 22.34T.
Change
+8.33%
New difficulty
24.20T
Period length
13.0 days
Network hashrate then (7-day)
179.5 EH/s
Bitcoin price then
$48,472
Hashprice then
$279/PH/day
The 2,016 blocks before it took 13.0 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 8.33%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.