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A060377 Pepin's test numbers. 1

%I

%S 3,9,6561,

%T 11790184577738583171520872861412518665678211592275841109096961

%N Pepin's test numbers.

%D See web page for references.

%H C. K. Caldwell, <a href="http://primes.utm.edu/glossary/page.php?sort=PepinsTest">Pepin's Test</a>

%F 3^((Fn-1)/2) where Fn is a Fermat number (A000215).

%e a(1) = 3^((F1-1)/2) = 3^((5-1)/2) = 3^2 = 9.

%K nonn

%O 0,1

%A _Jason Earls_, Apr 02 2001

%E Next two numbers have 15634 and 1024610092 digits respectively.

%E Corrected offset, formula and example _Harry J. Smith_, Jul 04 2009

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Last modified May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)