Education Technology

Prime Factors

Activity Overview

Students explore the concept of factors, prime factors and prime factorisation. With the assistance of the TI-15, students test if a division produces a remainder and explore the factors of a number using the FAC (factor) key on the TI-15.


Identify and describe factors and multiples of whole numbers and use them to solve problems. ACMNA-098


Prime, factor, composite

About the Lesson

Students use the TI-15 to help identify if a number is prime or composite. They use ‘remainder’ to help determine if a number is a factor and explore prime factor and prime factorization of numbers using the FAC (factor) key on the calculator. This task can be extended to include highest common factor.
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