October 31, 2021. Difficulty rose by +7.85% to 21.66T from 20.08T.
Change
+7.85%
New difficulty
21.66T
Period length
13.0 days
Network hashrate then (7-day)
160.1 EH/s
Bitcoin price then
$61,115
Hashprice then
$388/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 7.85%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.