Lee ebe e dere n'okpuru ebe a ma zaa ajụjụ a na-eso ya n'otu asụsụ ahụ e dere ebe ahụ: Ebe e dere: 1729 bụkwa nọmba Carmichael nke atọ, nọmba Chernick <unk> Carmichael nke mbụ (usoro A033502 na OEIS), na nke mbụ zuru oke Euler pseudoprime. Ọ bụkwa nọmba sphenic. Ajụjụ: kedu nọmba bụ 1729
nọmba sphenic