Erdős problem 723If there is a finite projective plane of order nn then must nn be a prime power?WorkspaceContinue locallyOpen sourceSign in to contributeOpen this exact Problem, source revision, and authority Repository in Workbench. This handoff does not clone, switch, upload, or execute anything.FilesErdős problem 7236 retained source recordsCanvaspublic previewSource#723→ResultNone→Checks0