I finished the first hidden prime sock. So named by my son, the intended recipient.
Co 52 stitches. Knit on size 2 in ribbing for 13 rnds. Switch to size 3 and continue for 53 rnds total. Heel knit over 24 sts for 13 slipped stitches. Return to size 3 and complete gussets and knit plain for 79 rnds. Usual toe reductions for 13 rnds.