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:
“Variability is one of the virtues of a woman. It avoids the crude requirement of polygamy. So long as you have one good wife you are sure to have a spiritual harem.”
—Gilbert Keith Chesterton (1874–1936)
“What wondrous life in this I lead!
Ripe apples drop about my head;
The luscious clusters of the vine
Upon my mouth do crush their wine;
The nectarine and curious peach
Into my hands themselves do reach;
Stumbling on melons, as I pass,
Ensnared with flowers, I fall on grass.”
—Andrew Marvell (1621–1678)