From 3ffc76713f6db4c33f20588ce6896ea3c2bae2a7 Mon Sep 17 00:00:00 2001 From: Charles Date: Sat, 17 Aug 2019 21:39:43 +0200 Subject: wip directory for each language --- python/wip/037-truncatable_primes.py | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 python/wip/037-truncatable_primes.py (limited to 'python/wip/037-truncatable_primes.py') diff --git a/python/wip/037-truncatable_primes.py b/python/wip/037-truncatable_primes.py new file mode 100644 index 0000000..1ad7d29 --- /dev/null +++ b/python/wip/037-truncatable_primes.py @@ -0,0 +1,25 @@ +from helper.prime import primes_loop, is_prime + + +def is_truncatable(prime): + p_str = str(prime) + for i in range(1, len(p_str)): + if not is_prime(int(p_str[i:])): + return False + for i in range(1, len(p_str)): + if not is_prime(int(p_str[:-i])): + return False + if prime in [2, 3, 5, 7]: + return False + return True + + +trunc_p_list = [] +for p in primes_loop(): + if is_truncatable(p): + trunc_p_list.append(p) + if len(trunc_p_list) == 11: + break + +print(trunc_p_list) +print(sum(trunc_p_list)) -- cgit