Largest prime factor of the n-th Fermat number F(n) = 2^(2^n) + 1.

A070592

Largest prime factor of the n-th Fermat number F(n) = 2^(2^n) + 1.

Terms

    a(0) =3a(1) =5a(2) =17a(3) =257a(4) =65537a(5) =6700417

External references