so just take 2 prime numbers that are greater than 7 and multiply them gotoeher
prime numbers can be evenly divided by 1 and themselves
9 is not prime becuase it can be divided by3 and get 3
11 is prime becua seit can be only divided by 11
so some numbers prime that are greater than 7
11,13,17,19
let's pick the smaller ones for easy multipy
11 times 13=143
one such number is 143
