# Problem 10 Summation of primes

The sum of the primes below $10$ is

$$\large 2 + 3 + 5 + 7 = 17$$

Find the sum of all the primes below two million.

# 问题 10 质数之和

$10$ 以下的质数之和为

$$\large 2 + 3 + 5 + 7 = 17$$

# 埃拉托斯特尼筛

Thank you for your support to Jason ~