lib/numb/emrip.rb in numb-0.111.0 vs lib/numb/emrip.rb in numb-0.114.0

@@ -8,10 +8,8 @@
   #     1009.emrip?  #=> true
   #     1193.emrip?  #=> true
   #     7.emrip?     #=> false
   #
   def emrip?
-    return false unless prime?
-    reversed = to_s.reverse.to_i
-    reversed != self and reversed.prime?
+    prime? and reverse != self and reverse.prime?
   end
 end