gistfile1.txt

#######ERROR#############
 ruby 3.rb
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- euler-help (LoadError)
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from 3.rb:5:in `<main>'
	
#######CODE#############
require 'euler-help'

lpf, num = 0, 600851475143

1.upto(Math.sqrt(num).to_i) do |n|
  if num % n == 0
    lpf = n if n.prime?
  end
end


#######Imported Code#############

class Integer
  def prime?
    return false if self <= 1
    return true if self == 2
    return false if self % 2 == 0
    
    2.upto((self/2).to_i) do |i|
      return false if self % i == 0
    end
    true
  end
end