3-Sep-1995

Unsolved Problem 36:

Is there any value of n other than 1, 2, and 4, such that n^n+1 is a prime?

Reference:

[Ogilvy 1988]
C. Stanley Ogilvy and John T. Anderson, Excursions in Number Theory. Dover. New York: 1988. Page 82.
Primes of the form n^n+1
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