November 24, 2015. Difficulty rose by +10.44% to 72.72B from 65.85B.
Change
+10.44%
New difficulty
72.72B
Period length
12.7 days
Network hashrate then (7-day)
0.5 EH/s
Bitcoin price then
$323
Hashprice then
$2,293/PH/day
The 2,016 blocks before it took 12.7 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 10.44%: 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.