Determining a chief range includes checking if it's only two distinct favourable divisors: 1 plus the number itself. To find out if a range is prime:『kokuu たんぱくプラス 雑穀米 グルテンフリー雑穀米』グルテンフリーで健康革命【口コミ・レビュー・評判/どこに売ってる？】2 min examine Rational Numb