From b4dd12104fac6be7adf33a74d8d53d482c92cacc Mon Sep 17 00:00:00 2001
From: Roman Gafiyatullin <r.gafiyatullin@me.com>
Date: Fri, 2 Oct 2015 20:30:35 +0300
Subject: [PATCH] factor: panic running againts power of two.

No further calculations required in case 'num' is already 1.
---
 src/factor/factor.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/factor/factor.rs b/src/factor/factor.rs
index 8f78e8739..b037be020 100644
--- a/src/factor/factor.rs
+++ b/src/factor/factor.rs
@@ -94,6 +94,9 @@ fn table_division(mut num: u64, factors: &mut Vec<u64>) {
         num /= 2;
         factors.push(2);
     }
+    if num == 1 {
+        return;
+    }
     if is_prime(num) {
         factors.push(num);
         return;