Nénten prasida dados wilangan prima sawiréh madué faktor sané akéhnyané nénten kakeniang, miwah nénten prasida manados wilangan genap sawiréh nénten prasida kadadosang pinaka pahan saking wilangan prima (sawiréh 0 stata patut manados sinalih tunggil faktor).
It cannot be key as it has an infinite amount of variables, and cannot be composite as it cannot be expressed as an item of primary figures (0 should normally be among the elements).