Keith Clusters
A Keith cluster is a related set of Keith numbers such that one is a multiple of another. For example, (14, 28), (1104, 2208), and (31331, 62662, 93993). These are possibly the only three examples of a Keith cluster.
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Famous quotes containing the words keith and/or clusters:
“Man is an exception, whatever else he is. If he is not the image of God, then he is a disease of the dust. If it is not true that a divine being fell, then we can only say that one of the animals went entirely off its head.”
—Gilbert Keith Chesterton (1874–1936)
“Where we such clusters had,
As made us nobly wild, not mad;
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Outdid the meat, outdid the frolic wine.”
—Robert Herrick (1591–1674)