November 29, 2013. Difficulty rose by +16.07% to 707.41M from 609.48M.
Change
+16.07%
New difficulty
707.41M
Period length
12.1 days
Network hashrate then (7-day)
0.0 EH/s
Bitcoin price then
$1,014
Hashprice then
$613,478/PH/day
The 2,016 blocks before it took 12.1 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 16.07%: 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.