Question

show that 13 multiply 17 multiply 19 multiply 23 multiply 1 + 23 is composite number​

Answer 1

Answer:

=13×17×19×23×1+23

=23(13×17×19×1+1)

=23(4199+1)

=23×4200×1

hence proved that it's a composite number as it has more than two factors.