 When this happens, the five involved primes form a prime quintuplet.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.