47237...93794 (586-digits)

This number is a composite.

The number of distinct prime factors of (((((((((4^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2 in the Lucas-Lehmer sequence will provide a(10) of A177892. The 11th term was determined by Sean A. Irvine in 2011.