def tryit(special,memo={}):
print special
if special in memo:
return memo[special]
memo[special]= None
result = None
for prime in p.primes_list:
count = 0
if prime in special:
continue
for s in special:
if p.is_prime(p.concat_nums(prime,s)):
if p.is_prime(p.concat_nums(s,prime)):
count +=1
if count == len(special):
result = special+(prime,)
break
if result == None:
for i in range(len(special)):
for prime in p.primes_list[1:]:
if prime not in special:
result = tryit(special[:i]+(prime,)
+special[i+1:])
if result:
print result
break
if result:
break
memo[special] = result
return memo[special]
def is_concat(p1,p2,misconcat={}):
if (p1,p2) in misconcat:
return misconcat[(p1,p2)]
misconcat[(p1,p2)]=False
if (pr.is_prime(pr.concat_nums(p1,p2))
and pr.is_prime(pr.concat_nums(p2,p1))):
misconcat[(p1,p2)] = True
misconcat[(p2,p1)] = True
return misconcat[(p1,p2)]
