module Multiprime

Constants

VERSION

Public Class Methods

primes() click to toggle source 
# File lib/multiprime.rb, line 10
def self.primes
  2.upto(Float::INFINITY).lazy.select { |n| 2.upto(Math.sqrt(n)).none? { |i| n % i == 0 } }
end
table(size) click to toggle source 
# File lib/multiprime.rb, line 5
def self.table(size)
  range = primes.take(size).to_a
  return range.map { |x| range.map { |y| x * y } }, range
end