70以内的质数有2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67
70以内的合数有
4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48,49,50,51,52,54,55,56,57,58,60,62,63,64,65,66,68,69,70
70以内的质数和合数
质数,2,3,5,7,Ⅱ,13,17,19,23,29,31,3T,41,43,47,53,59,61,67。