gistfile1.txt

def prime?(number)
  return false if number == 1
  2.upto(number) do |key|
    return false if number != key && number.to_f % key == 0
  end
  true
end

primes = [*1...100].select{|n| prime? n}
data = []
primes.each do |m|
  primes.each do |n|
    next if m * n > 100
    data << m * n
  end
end
data.sort.uniq