下面哪些是质数?希望能认真
问题描述:
下面哪些是质数?希望能认真
167 11 157 147 137 127 117 107 97 87 77 67 57 47 37 27 17 7 31 41 51 61 71 81 91 101 111 131 141 151 161
答
16711157147/3 = 49 137127117/3 = 391079787/3 = 2977/7 = 116757/3 = 19473727/3 = 9177314151/3 = 17617181/3 = 2791/7 = 13101111/3 =37131141/3 = 47151161/7 = 23