The Bitcoin network difficulty has now climbed to 72,722,780,643 which is an increase of 10.44% over the previous increase. The previous difficulty was 65,848,255,179.7 which arrived via a 5.77% increase the highest in six months. Today's increase is the most substantial jump in more than a year with the closest recent increase of this magnitude being a 10.05% increase on November 5th of 2014, with the previous greater increase coming all the way back on September 25th 2014. New all time high difficulty figures come with astounding regularity, but the magnitude of these last two increases is notable.