Finds the number of primes between n 1 and n 2.

找出输入两正整数之间所含质数数目.

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Certain important primes seem to peak later in life.

某些最佳时期似乎在生命的后半段才会到来.

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We can also ask whether there are infinitely many primes?

我们还可以问,是否有无穷多个素数?

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There is an infinite number of primes.

素数的数目是无限的.

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Asymmetric - key cryptography uses primes extensively.

非对称密钥密码需要广泛运用素数.

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The prime number theorem of Gauss and Legendre approximates the number of primes less than x.

素数定理高斯和勒接近若干素数不到十.

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