Question

Explain whether 3×12×101+4 is a prime number or a composite no

Answer 1

= 3 × 12 × 101 + 4 = 4(3 × 3 × 101 + 1)

             

= 4(909 + 1)

             

= 4(910)

             

= 2 × 2 × 2 × 5 × 7 × 13

           

=Composite number

(Product of more than two prime factors)