X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=primes.rb;h=7e2cfaacaa817e2418271d2544961271b0bb245a;hb=19cdd89260d84da6258049389ee7b0d43f02a749;hp=23fd44737758478dfe7cad13b159755b3f94a9c9;hpb=58e5a1ba3f7af1f5e27c71dae276bfa8e979b5de;p=project-euler.git

diff --git a/primes.rb b/primes.rb
index 23fd447..7e2cfaa 100644
--- a/primes.rb
+++ b/primes.rb
@@ -101,3 +101,11 @@ class Primes
 
 end
 
+
+class Integer
+  @@primes = Primes.instance
+  
+  def prime?
+    @@primes.include? self
+  end
+end