Finds the number of primes between n 1 and n 2.找出輸入兩正整數(shù)之間所含質(zhì)數(shù)數(shù)目.Certain important primes seem to peak later in life.某些最佳時(shí)期似乎在生命的后半段才會(huì)到來.We can also ask whether there are infinitely many primes?我們還可以問,是否有無窮多個(gè)素?cái)?shù)?...