As detailed on TheOtherWiki [[ here]], the number 47 has become an in joke among groups of mathematicians and screenwriters, improbable as the crossover may seem.

(it's a [[NumerologicalMotif prime number]], by the way)
* One of the biggest users (and according to some, the originator of the trope) is the ''Franchise/StarTrek'' franchise, to the point of having a page on its [[ wiki]].
* J.J. Abrams picked this up and uses it in his series, most prominently in ''{{Series/Revolution}}'' and ''{{Series/Fringe}}''.
* The protagonist of the ''VideoGame/{{Hitman}}'' series.
* Averted by HK-47 from ''VideoGame/KnightsOfTheOldRepublic'', who is named after the AK-47. Same goes for the multitude of fictional guns with [[AKA47 47 in the name]].
* As most (all?) the writers of the ''Roleplay/LeagueOfIntergalacticCosmicChampions'' were ''Franchise/StarTrek'' fans 47s were a big in joke there too.
* Pomona College is big on the number 47 [[]] (Connected to the ''Franchise/StarTrek'' example in fact).
* The Wonderbolts of the ''Blog/ReadingRainbowverse'' are part of Spec Op group 47.