haggen · May 27, 2011 16:20
diff --git a/prime.rb b/prime.rb
 #!/usr/bin/ruby

 # Find out if given number is prime
 # based on http://zmievski.org/2010/08/the-prime-that-wasnt by ANDREI ZMIEVSKI
 # inspired by http://pastebin.com/PGT94gdF by MAURO BARALDI

 def prime?(n)
 	n = '1' * n.to_i
 	n == '1' or !n[/^1?$|^(11+?)\1+$/]
 end

 puts prime?(ARGV[0]), "\n\n"
	#!/usr/bin/ruby

	# Find out if given number is prime
	# based on http://zmievski.org/2010/08/the-prime-that-wasnt by ANDREI ZMIEVSKI
	# inspired by http://pastebin.com/PGT94gdF by MAURO BARALDI

	def prime?(n)
	n = '1' * n.to_i
	n == '1' or !n[/^1?$\|^(11+?)\1+$/]
	end

	puts prime?(ARGV[0]), "\n\n"
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