sum of first 2000000 prime numbers

sieve_of_eratosthenes.py

"""
sum of first 2000000 prime numbers
output: 142913828922
"""
num = 2000000
sieve = [True] * num
sieve[0] = False
i = 2

while (i * i <= num):
  if sieve[i-1] == True:
    for k in range(2 * i, num + 1, i):
      sieve[k-1] = False      
  i += 1

print(sum(i for i, value in enumerate(sieve, 1) if value))