def is_truncatable(num):
digits = elib.to_digits(num)
for i in xrange(1, len(digits)):
if not elib.is_prime(elib.from_digits(digits[i:])) or \
not elib.is_prime(elib.from_digits(digits[:i])):
return False
return True
def main(argv):
sum_primes = 0
for i in range(1, 2000000):
if (elib.is_prime(i)):
sum_primes += i
print " ANS = " + str(sum_primes)
import elib
import itertools
for i in range(9, 1, -1):
for perm in itertools.permutations(range(i, 0, -1)):
n = elib.from_digits(perm)
if elib.is_prime(n):
print(n)
return
def check_coefs(a, b):
i = 0
while elib.is_prime(i * i + i * a + b):
i += 1
return i