1,2,3,4,7,9,13,16,23,27,31,.39,41,47,55,67,87,95哪些是合数,哪些是素数?

问题描述:

1,2,3,4,7,9,13,16,23,27,31,.39,41,47,55,67,87,95哪些是合数,哪些是素数?

合数:4,9,16,27,.39,55,87,95
素数:2,3,7,13,23,31,41,47,67