How old is the idea of premillenial rapture? Wikipedia claims that the doctrine of rapture was first formed in the 17th century:


  The concept of the Rapture, in connection with premillennialism, was expressed by the 17th-century American Puritan father and son Increase and Cotton Mather. They held to the idea that believers would be caught up in the air, followed by judgments on the Earth, and then the millennium.


Is this the earliest mention of the doctrine?
I don't know how much weight should be put on this reference, but it does give different information:


  It may come as a surprise but the doctrine of the Rapture is not mentioned in any Christian writings, of which we have knowledge, until after the year 1830 C.E. Whether the early writers were Greek or Latin, Armenian or Coptic, Syrian or Ethiopian, English or German, orthodox or heretic, no one mentioned it before 1830 (though a sentence in Pseudo-Dionysius in about 500 C.E. could be so interpreted). Of course, those who feel the origin of the teaching is in the Bible would say that it ceased being taught for some unknown reason at the close of the apostolic age only to reappear in 1830. But if the doctrine were so clearly stated in Scripture, it seems incredible that no one should have referred to it before the 19th century.