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Improved utility files
[project-euler.git]
/
primes.rb
diff --git
a/primes.rb
b/primes.rb
index 23fd44737758478dfe7cad13b159755b3f94a9c9..7e2cfaacaa817e2418271d2544961271b0bb245a 100644
(file)
--- a/
primes.rb
+++ b/
primes.rb
@@
-101,3
+101,11
@@
class Primes
end
end
+
+class Integer
+ @@primes = Primes.instance
+
+ def prime?
+ @@primes.include? self
+ end
+end