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I'm looking for a characterization of graphs that are prime under the Cartesian product, with prime defined as in this questionthis question. Does such a characterization exist, either in general or after restricting to connected bipartite graphs?

I'm looking for a characterization of graphs that are prime under the Cartesian product, with prime defined as in this question. Does such a characterization exist, either in general or after restricting to connected bipartite graphs?

I'm looking for a characterization of graphs that are prime under the Cartesian product, with prime defined as in this question. Does such a characterization exist, either in general or after restricting to connected bipartite graphs?

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Which graphs are prime under the Cartesian product?

I'm looking for a characterization of graphs that are prime under the Cartesian product, with prime defined as in this question. Does such a characterization exist, either in general or after restricting to connected bipartite graphs?