random.rb

#!/usr/bin/env ruby

spread = {}

class ShiftRandom
	def initialize(seed = 1)
		@seed = seed
		@accumulator = seed
	end
	
	def next
		mask = @accumulator
		
		@accumulator <<= 1
		
		@seed = (@seed + (@seed ^ mask)) % (2**32)
		@accumulator = (@accumulator + (@accumulator ^ @seed)) % (2**32)
	end
end

random = ShiftRandom.new

numbers = File.open("numbers.txt", "w+")

10000.times do
	numbers.puts random.next
end

numbers.close

Distribution of default seed: https://www.answerminer.com/calculators/histogram?id=a365b3c97f72303a