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From 30 to 60 Is Not Twice as Hard

by

Michael Dalezman (Yeshiva University)

This article originally appeared in:
Mathematics Magazine
April, 2000

Subject classification(s): Algebra and Number Theory | Number Theory | Primes


The author proves and generalizes the fact that 60 is the largest positive integer \(n\) such that all smaller numbers relatively prime to \(n\) are primes or powers of one prime.


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