457 (CDLVII) ebile ngwaga wa go thoma ka Mošupologo, ngwaga wa boseswai ngwagengsome wa 450s, ngwaga wa bomasomehlano šupa ngwagengkgolo wa Ngwagakgolo 5, le ngwaga wa bomakgolo nne masomehlano šupa ngwagengkete wa Ngwagakete 1.