Probably nothing, but here’s a fellow named Carl Munck who formulated his code, sourced in the Giza pyramids, about the same time as The Shining was being filmed. I’ve checked through all of these pages in shot 437, and MUnck (Münck?) may be the most deviant variation of Jack in the prime sentence.
Remember that we’ve just seen a pyramid related object highlighted by a white speck in the shot before this (436), as well as a large red sparkle toward the end of the shot. This doesn’t seem chance. But what of the possible Carl Munck connection? Is Kubrick saying that Jack has become just as crazy as Munck with his huge matrix of geomantic number connections… page after page after page after page?
Also keep in mind here the thought that The Shining’s sno-cat, the rescue vehicle for Wendy and Danny, is a symbol for the Sphinx, which Munck claims in this video (1:48) is more a kitten than a full grown cat.
http://idyllopuspress.com/idyllopus/film/shining_8am.htm
Rather than looking at it as crazy Jack simply having typed the same phrase over and over again in a fit of insanity, the repeated phrase is another expression of this deja vu and repeating patterns, such as in the world maze where we had the same repeating patterns ad infinitum. [my emph] This repeated phrase is, after all, a Kubrick invention. It did not appear in the King book.