venriq/prime_numbers.rb

Created February 14, 2015 02:57

Star () You must be signed in to star a gist
Fork () You must be signed in to fork a gist

Learn more about clone URLs
Clone this repository at <script src="https://gist.github.com/venriq/c195cdb98b3f7ba2df41.js"></script>
Save venriq/c195cdb98b3f7ba2df41 to your computer and use it in GitHub Desktop.

Download ZIP

Raw

prime_numbers.rb

	class Fixnum
	def prime?
	('1' * self) !~ /^1?$\|^(11+?)\1+$/
	end
	end

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment