Connected quandles of size $pq$ and $4p$

Abstract

We classify all non-simple connected quandles of size $pq$ and $4p$ where $p,q$ are primes, as a special family of locally strictly simple quandles (i.e. quandles for which all proper subquandles are strictly simple). In particular we classify all latin quandles of size $pq$ and $4p$ and we show that latin quandles of size $8p$ are affine.