The hardware and software on this system was updated September 4th. Please let me know of any problem you encounter. <firstname.lastname@example.org>Jacobi symbol (k|Fn) is -1. These include k=3, 5, and 10.
If Fn is prime, this primality can be shown by Pepin's test, but when Fn is composite, Pepin's test does not tell us what the factors will be (only that it is composite). For example, Selfridge and Hurwitz showed that F14 was composite in 1963, but we still do not know any of its divisors.
Related pages (outside of this work)