January 10, 2017. Difficulty rose by +6.05% to 336.90B from 317.69B.
Change
+6.05%
New difficulty
336.90B
Period length
13.2 days
Network hashrate then (7-day)
2.4 EH/s
Bitcoin price then
$884
Hashprice then
$850/PH/day
The 2,016 blocks before it took 13.2 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 6.05%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.