Primes Review

gistfile1.rb

def primes(num)
  primes = [ ]
   (2..num).each do |divider|
      until num % divider != 0
        if num % divider == 0
          primes << divider
          num = num/divider
        end
      end
    end
  primes
end

def primes num
  while num == 1
    (2..num).each do |divider|
    original = num
    if num > 0 and divider = num-1 and num % divider == 0
      primes << divider
      num = num/divider
    end
  end
end
puts primes(81).inspect