Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A graphical representation of the natural numbers in a spiral formation, showing that the prime numbers, when highlighted, tend to fall in clusters and diagonal lines.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After Stanislaw Marcin Ulam, (1909–1984), Polish-born American mathematician who discovered it.]

Examples

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  • April 10, 2011