Consider, & Consider, \\\\N1​​=7×11×13+13=13×(7×11+1)=13×78=13×2×3×13=2×3×132​N2​=7×6×5×4×3×2×1+5=5×(7×6×4×3×2×1+1)=5×1009​ Both N1​ and N2​ are expressed as a product of primes. Therefore, both are composite numbers.