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