Prerequisite: How to move programs to your TI84 Calculator The programs below are written in TIBASIC, which can be transferred from your computer to your TI84. You will need two items:
• A USB cable, Type A male to Type B Mini male 

FACTOR.zip A tiny program that does one thing: factor numbers. Put in any number greater than 2, and it will return all factors. If the number is prime, the program will return the message it is a prime number.  
QuadProf202.zip
Quadratic Professor, version 202. Replaces Quadratic Theta, an earlier version. This program is great for checking your work. It takes three numbers, the coefficients of a quadratic expression in the form of Instructions.docx  
RADICAL.zip Radical. It does one thing: takes a radical number, like √128, and expresses it in simplest exact form, 8√2. Included is a version that works on the older TI84 Plus models.  
LISTPRIME.zip List Primes. It does one thing: Take any number n, and lists all the primes from 2 to n. It will store the results into builtin list, L_{1}. See graphic on the left. 