1 files changed, 1 insertions, 0 deletions
diff --git a/lib/mathn.rb b/lib/mathn.rb
index 14e2e9272c..a5a121c6c6 100644
--- a/lib/mathn.rb
+++ b/lib/mathn.rb
@@ -43,6 +43,7 @@ class Integer
   end
   
   def prime_division
+    raise ZeroDivisionError if self == 0
     ps = Prime.new
     value = self
     pv = []