KevinWMatthews

# Get Sublime Text to use your rvm ruby without hardcoding a `$USER`.
#
# Include the configurations below the commend in the appropriate file listed below:
#
#  - OS X ST2: ~/Library/Application Support/Sublime Text 2/Packages/Ruby/Ruby.sublime-build 
#  - OS X ST3: ~/Library/Application Support/Sublime Text 3/Packages/User/Ruby.sublime-build
#  - Linux ST2: ~/.config/sublime-text-2/Packages/Ruby/Ruby.sublime-build
#  - Linux ST3: ~/.config/sublime-text-3/Packages/User/Ruby.sublime-build

{

KevinWMatthews

def self.prime?(num)
  return num > 1 if num <= 3
  return false if (divisible?(num,2) || divisible?(num,3))

  # loop while (6*k-1)**2 <= num, or
  # k <= (1+sqrt(num)/6)
  max_k = (Math.sqrt(num)+1)/6.0
  return false if (1..max_k).any? {|k| divisible?(num,6*k+1) || divisible?(num,6*k-1)}
end

KevinWMatthews

class Prime
  include Enumerable

  def self.nth(index)
    raise ArgumentError, 'index out of bound' if index <= 0
    new.take(index).last
  end

  def each(&block)
    (2..Float::INFINITY).each do |i|