Article the First was the first proposed amendment to the Constitution. It's original goal was to give each state a representative to the House for every 30,000 people. It's original text was:
"Article the first... After the first enumeration required by the first article of the Constitution, there shall be one Representative for every thirty thousand, until the number shall amount to one hundred, after which the proportion shall be so regulated by Congress, that there shall be not less than one hundred Representatives, nor less than one Representative for every forty thousand persons, until the number of Representatives shall amount to two hundred; after which the proportion shall be so regulated by Congress, that there shall not be less than two hundred Representatives, nor more than one Representative for every fifty thousand persons."
Article The First obviously was never ratified. Besides some other boring rules, if was enacted and still active today the numbers would be shocking. If you used the original rules with the population of today there would be up to 6,175 congressmen.