# Computing the order of a group

by Benzoate
Tags: computing, order
 Sci Advisor HW Helper P: 2,538 |a|=15 means that 15 is the lowest power of a that is equal to the identity. So, for example, $$a^{42}=a^{15}\times a^{15} \times a^{12}=e \times e \times a^{12}=a^{12}$$ so you've got too many things in your list.