p11 thumb is a period-11oscillator discovered by Charity Engine on August 11, 2022 in a tetramer form (shown below).[1] It was monomerized by dani that same day. That version (see infobox), at 34 cells, is the second smallest known period-11 oscillator behind only rattlesnake with 33 cells. It is the first asymmetric p11 rotor to appear in an official Catagoluesymmetry, and the oscillator as a whole is only slightly larger than rattlesnake, the smallest known p11 oscillator.