A comparison of AR 3664 on May 13th as it approached the southwest limb and on May 29th as it returns into view off the southeast limb. Clearly the region shrunk in size while transiting the farside of the Sun, however it retains some magnetic complexity and will remain a threat for a solar flare above the M5.0 threshold. The region produced numerous mid to upper level C-Flares and one low level M-Flare during the past 24 hours. Imagery by SDO/HMI.