60 is composite because it's 2×2×3×561 is prime62 is composite because it's 2×31 63 is composite because it's 3×3×7 64 is composite because it's 2×2×2×2×2×2 65 is composite because it's 5×13 66 is composite because it's 2×3×1167 is prime68 is composite because it's 2×2×17 69 is composite because it's 3×23 70 is composite because it's 2×5×7 Edwin