What is the least positive integer that is not a factor of 2

positive integers from smallest:1,2,3,4,。。。1 is a factor,25!=1*25!2 is a prime number3 is a prime number4 is a factor,25!=4*1*2*3*5*6*。。。*2525!指的是25阶乘=25*24*。。。*15显然是factor6,7,8,9,10,。。。,25显然都是factor26=2*13也是27=3*3*3,25!中有3和9,所以也是factor28=4*7,factor29是prime30=3*1031prime32=4*8,factor33=3*11,factor34=2*17,factor35=5*7,factor36=4*9,factor37prime38=2*19,factor39prime40=4*10,factor41prime42=2*21factor43prime44=4*11factor45=5*9factor46=2*23factor47prime48=6*8factor49=7*7,25!包含7和14,factor50=5*10factor51=3*17factor52=4*13factor53prime54=2*3*9,factor55=5*11,factor56=7*8,factor57=3*19,factor58=2*29,not a factor and not a primeSo 58 is the least positive integer that is not a factor of 25!and is not a prime number。