Prime pursuit: constructing an efficient prime number detector.

Science News | October 26, 2002| | Copyright

Prime numbers lie at the core of some of the oldest and most perplexing questions in mathematics. Evenly divisible only by themselves and 1, they are the building blocks of integers. In recent decades, prime numbers have emerged from their starring roles in mathematical research (SN: 5/25/02, p. 324) by becoming prized commodities--as elements in a cryptographic scheme widely used to keep digital messages secret (SN: 2/6/99, p. 95).

Although there are infinitely many primes, they are also relatively scarce and rather haphazardly scattered among the integers. Indeed, ...

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