## Discrete Mathematics and Its Applications, Seventh Edition

a) 3⋅13 b) $3^4$ c) prime d) 11⋅13 e) 17⋅7 f) 29⋅31
To find the prime factorization of these integers, we proceed methodically through the integers using divisibility tests to inform which numbers we check as factors. a) 39=3⋅13 b) $81=9^2=3^4$ c) 101 is prime d) 143=11⋅13 e) 289=17⋅7 f) 899=29⋅13