def prime_length(a, b):
length = 0
for x in itertools.count(0):
if prime(func(x, a, b)):
length += 1
else:
break
return length
from mathe import prime
sum = 0
max = 2000000
for num in range(1, max+1):
if prime(num):
sum += num
print sum
from mathe import prime
target = 10001
lastprime = 2
num = 1
test = 3
while(num < target):
if(prime(test)):
num += 1
lastprime = test
test += 2
print lastprime
