Given two cohomology theories $h^{\bullet}$ and $k^{\bullet}$, we define their direct sum $(h \oplus k)^{\bullet}$ as the cohomology theory $(h \oplus k)^{n}(X) := h^{n}(X) \oplus k^{n}(X)$. If I'm not wrong, this is another cohomology theory, whose spectrum is the wedge product of the corresponding spectra. For example, the singular cohomology with coefficients in $\mathbb{Z} \oplus \mathbb{Z}$ is the direct sum of two copies of the one with coefficients in $\mathbb{Z}$.


Let us call a theory $h^{\bullet}$ irreducible if it is not decomposable as a non-trivial direct sum. Is it true that, if $h^{\bullet}$ is irreducible, then the cohomology groups of the point are also irreducible? In other words, is it true that $h^{n}(pt) = \mathbb{Z}, \mathbb{Z}/p\mathbb{Z}$ or $0$, but never a non-trivial direct sum of them?


If the answer is no, is it true for multiplicative theories?


Added later: The answer is no, as shown by Eric Wofsey. So I modify the question: is it true that the free part of $h^{n}(pt)$ is $\mathbb{Z}$ or $0$, but never $\mathbb{Z}^{n}$ with $n > 1$?



Irreducible cohomology theories
The sphere spectrum, representing stable cohomotopy, is irreducible (you can see this, for instance, from the fact that its homology is irreducible and any summand would be connective and thus would have to have nontrivial homology). But the associated cohomology of a point is the stable homotopy groups of spheres, which are certainly not irreducible in general.


