#!/usr/bin/env python
import sys, math
sys.path.append("../../../lib")
from natural import Prime
p = Prime()
s = 0
while p.next() < math.sqrt(2000000):
pass
pl = p.prime_list
s = sum(pl)
for i in range(pl[-1] + 2, 2000000, 2):
is_prime = True
for j in pl:
if i % j == 0:
is_prime = False
break
if is_prime:
s += i
print s
