  We study the homotopy category $\mathrm{hef}(R,W)$ (and its
$\mathbb{Z}_2$-graded version $\mathrm{HEF}(R,W)$) of elementary
factorizations, where $R$ is a B\'ezout domain which has prime elements and
$W=W_0 W_c$, where $W_0\in R^\times$ is a square-free element of $R$ and
$W_c\in R^\times$ is a finite product of primes with order at least two. In
this situation, we give criteria for detecting isomorphisms in
$\mathrm{hef}(R,W)$ and $\mathrm{HEF}(R,W)$ and formulas for the number of
isomorphism classes of objects. We also study the full subcategory
$\mathbf{hef}(R,W)$ of the homotopy category $\mathrm{hmf}(R,W)$ of finite rank
matrix factorizations of $W$ which is additively generated by elementary
factorizations. We show that $\mathbf{hef}(R,W)$ is Krull-Schmidt and we
conjecture that it coincides with $\mathrm{hmf}(R,W)$. Finally, we discuss a
few classes of examples.
