from helpers import is_prime_sieve
is_prime = is_prime_sieve(10000)
for i in range(1000, 10000 - 6660):
if is_prime(i):
a = sorted(str(i))
b = sorted(str(i + 3330))
c = sorted(str(i + 6660))
if a == b == c and is_prime(i + 3330) and is_prime(i + 6660):
print i, i + 3330, i + 6660
from helpers import is_prime_sieve
def term(m,n):
#mth term along nth diagonal
return 1 + (2*n)*m + 4*(m-1)*m
is_prime = is_prime_sieve(term(13121,4))
m = 0
termcount = 0
while True:
m += 1
termcount += len([1 for n in range(1,5) if is_prime(term(m,n))])
ratio = termcount/(m*4.0+1)
if ratio < 0.10:
print m*2+1, ratio
break
import itertools
from helpers import is_prime_sieve
is_prime = is_prime_sieve(7654321)
print reduce(
max,
filter(is_prime,
map(lambda x: int(''.join(x)), itertools.permutations('1234567'))))
from helpers import is_prime_sieve
is_prime = is_prime_sieve(10000)
for i in range(1000,10000-6660):
if is_prime(i):
a = sorted(str(i))
b = sorted(str(i + 3330))
c = sorted(str(i + 6660))
if a == b == c and is_prime(i+3330) and is_prime(i+6660):
print i, i + 3330, i + 6660
import itertools
from helpers import is_prime_sieve
is_prime = is_prime_sieve(7654321)
print reduce(max, filter(is_prime, map(lambda x: int(''.join(x)), itertools.permutations('1234567'))))