 A prime quadruplet ("p", "p" + 2, "p" + 6, "p" + 8) contains two overlapping prime triplets, ("p", "p" + 2, "p" + 6) and ("p" + 2, "p" + 6", p" + 8).Similarly to the twin prime conjecture, it is conjectured that there are infinitely many prime triplets.The first known gigantic prime triplet was found in 2008 by Norman Luhn and François Morain.