ʻO ka helu mua kahi helu kūlohelohe i ʻoi aku ma mua o ka 1 ʻaʻohe mea nāna e hoʻokaʻawale i nā mea ʻē aʻe ma mua o 1 a iā ia iho. ʻO ka helu mua liʻiliʻi he ʻelua - ʻo kāna mahele maikaʻi hoʻokahi a ʻelua. ʻO ʻelua wale nō ka helu nui wale. He ʻano ʻē kēlā me kēia helu helu ʻē aʻe, no ka mea, ua mahele ʻia nā helu ʻē aʻe āpau i ʻoi aku i ka ʻelua. ʻO nā helu helu mua loa: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31…