OFFSET
1,1
COMMENTS
The a(n)-th almost-Fibonorial number is prime.
If it exists, a(8) > 1300. - Michael S. Branicky, Aug 17 2024
LINKS
C. K. Caldwell, Fibonacci Numbers.
Eric Weisstein's World of Mathematics, Fibonorial.
MATHEMATICA
a = 1; Do[ a = a*Fibonacci[n]; If[ PrimeQ[a - 1], Print[n] ], {n, 1, 247} ]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Feb 07 2001
EXTENSIONS
Definition corrected by Daniel Forgues, Nov 29 2009
Name edited by Michel Marcus, Jan 17 2024
STATUS
approved