def main():
s = time.time()
return [
find_truncatable_primes(mwmath.build_prime_list(1000000)),
time.time() - s
]
The primes 3, 7, 109, and 673, are quite remarkable. By taking any two primes and
concatenating them in any order the result will always be prime. For example,
taking 7 and 109, both 7109 and 1097 are prime. The sum of these four primes,
792, represents the lowest sum for a set of four primes with this property.
Find the lowest sum for a set of five primes for which any two primes concatenate
to produce another prime.
'''
import time
import mwmath
import re
s = time.time()
p_list = mwmath.build_prime_list(10000)
print time.time()-s
t = time.time()
for p_1 in p_list:
for p_2 in p_list:
if p_2<=p_1:
continue
if not mwmath.concat_prime_list(p_2,[p_1],p_list):
continue
for p_3 in p_list:
if p_3<=p_1:
continue
if p_3<=p_2:
continue
def main():
s = time.time()
return [find_truncatable_primes(mwmath.build_prime_list(1000000)),time.time()-s]
'''Project Euler test
'''
import mwmath
p = []
ii = 100
while len(p) < 50:
p = mwmath.build_prime_list(ii)
ii += 5
print p
'''Project Euler test
'''
import mwmath
p = []
ii = 100
while len(p)<50:
p = mwmath.build_prime_list(ii)
ii+=5
print p
