Class: Primus

Inherits:
Object
  • Object
show all
Defined in:
lib/primus.rb

Class Method Summary collapse

Class Method Details

.is_prime?(n) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/primus.rb', line 3

def self.is_prime?(n)
  ('1' * n) !~ /^1?$|^(11+?)\1+$/
end