G1.4 Given that the sum of two prime numbers is 105 . If the product of these prime numbers is $d$, find the value of $d$.
" 2 " is the only prime number which is an even integer. The sum of two prime number is 105 , which is odd
$\Rightarrow$ One prime is odd and the other prime is even
$\Rightarrow$ One prime is odd and the other prime is 2
$\Rightarrow$ One prime is 103 and the other prime is 2
$$
d=2 \times 103=206
$$