3. Natural numbers greater than 1 that can only be divided by 1 and themselves, such as $2,3,5,7$, are called prime numbers or primes. Every natural number can be written as the product of several (possibly the same) prime numbers, for example, $4=2 \times 2,6=2 \times 3,8=2 \times 2 \times 2,9=3 \times 3,10=2 \times 5$, etc. Therefore, $2 \times 2 \times 2 \times 2 \times 3 \times 3-1$ written in this form is $\qquad$.
$143=11 \times 13$