December 2, 2016. Difficulty rose by +1.76% to 286.77B from 281.80B.
Change
+1.76%
New difficulty
286.77B
Period length
13.8 days
Network hashrate then (7-day)
2.1 EH/s
Bitcoin price then
$751
Hashprice then
$667/PH/day
The 2,016 blocks before it took 13.8 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 1.76%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.