January 9, 2021. Difficulty rose by +10.79% to 20.61T from 18.60T.
Change
+10.79%
New difficulty
20.61T
Period length
12.6 days
Network hashrate then (7-day)
149.6 EH/s
Bitcoin price then
$38,501
Hashprice then
$230/PH/day
The 2,016 blocks before it took 12.6 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 10.79%: one of the largest adjustments on record. For every machine on the network that is a pay cut of the same size until the next retarget.