class Prime::Generator23

method.
checking primality of an integer by brute force
This is a pseudo-prime generator, suitable on
are not divisible by either 2 or 3.
Generates all integers which are greater than 2 and

def initialize 

def initialize
  @prime = 1
  @step = nil
  super
end

def rewind 

def rewind
  initialize
end

def succ 

def succ
  if (@step)
    @prime += @step
    @step = 6 - @step
  else
    case @prime
    when 1; @prime = 2
    when 2; @prime = 3
    when 3; @prime = 5; @step = 2
    end
  end
  @prime
end