Question

Write the greatest $4$ digit number and express it in terms of its prime factors.

Answer 1

Greatest $4$ digit number is $9999$.

Prime factorization of greatest $4$ digit number is $9999$ by division method is

Therefore, $9999=3\times 3\times 11\times 101$

Hence, the greatest $4$ digit number is $9999$ and its prime factor is $9999=3\times 3\times 11\times 101$.