Prime quadruplet 23620, 152141, 1028789, 7188960, 51672312, 381226246, 2873279651 . The constant representing the sum of the reciprocals of all prime quadruplets, Brun's constant for prime quadruplets, denoted by "B", is the sum of the reciprocals of all prime quadruplets: with value: This constant should not be confused with the Brun's constant for cousin primes, prime pairs of the form ("p", "p" + 4), which is also written as "B". The prime quadruplet {11, 13, 17, 19} is alleged to appear on the Ishango bone although this is disputed. Excluding the first prime quadruplet, the shortest possible distance between two quadruplets {"p",
17-11-70 17-11-70 17-11-70 (US title "11-17-70"), released in 1971, is the fifth official album release for Elton John, and his first live album. The recording was taken from a live radio broadcast on 17 November 1970, hence the album's title. According to John, a live album was never planned as a release. Recordings of the broadcast, however, were popular among bootleggers which, according to John's producer, Gus Dudgeon, eventually prompted the record label to release it as an album. It has been said that the release by an eastern bootlegger of the whole 60-minute air cast rather than the 48 minutes