There are various examples of (non-separable) prime C$^*$-algebras $A$ which are not primitive. Is there an example for which $A$ is $\sigma$-unital but non-unital?

## 1 Answer

It seems to me you could just tensor a unital example with the compacts. Any closed ideal of $A \otimes K$ has the form $I\otimes K$ where $I$ is a closed ideal of $A$, etc.