Composite number: A whole number that can be divided exactly by numbers other than 1 or itself.
Given 7 x 11 x 13 x 17 +17
17 (7 x 11 x 13 x 17 +1)
17 (7 x 11 x 13 x 17 +1)
17 (17017 + 1)
17 (17018)
17 (2 × 8509)
17 × 2 × 8509
So, given number is the composite number because it is the product of more than one prime numbers.