calcMod vs Prime Numbers Math Games

What are all the digits of the factorial of 79 and how many digits ? Want to know if a big integer is prime ? The change mod function indicates when the number is prime. Want to know the divisors of an integer ? A prime divisor has no inverse modulo this integer. The "n!" button calculates the factorial of an integer from 0 to 80. Factorial are limited to factorial of 80, but the calculator could calculate them up to 2000 ! (ProX version) The "change mod" (change modulo) function indicates when the modulo is prime. There is a limit to 10^10 for modulo in this FREE version (no limit with ProX version). You can stoke one number and recall it when you want. The "Mod" operation indicates the residue modulo N. The exp function allow modular exponentiation (as + - *) The "INV" function calculates the inverse of an integer modulo N. This app is intended for both mathematics teachers and/or their students, or if you are interested in the beauty of numbers. Enjoy calcMod-Light ! Les commentaires sont disponibles en français (réglages).

Prime Numbers Math Games helps you learn and practise prime numbers, HCF, and LCM through simple lessons and quick number challenges. Start with clear learning screens, then test your number skills in interactive games. You can practise identifying prime numbers, play timed challenges, and build confidence with HCF and LCM calculations. Main Features: • Learn what prime numbers are • View prime number examples from 1 to 100 and beyond • Practise prime number identification • Play classic and timed challenge modes • Learn and practise HCF calculations • Learn and practise LCM calculations • Choose difficulty levels for different practice needs • Clean, simple interface for focused learning • No data collection Why Use This App: Prime numbers, HCF, and LCM are important foundations in mathematics. This app turns number practice into short, focused activities that are easy to understand and quick to play. Suitable for: • Learners practising number skills • Students reviewing prime numbers, HCF, and LCM • Parents supporting math revision • Teachers looking for a simple classroom practice tool • Anyone who enjoys mental math and number puzzles Build your number sense one challenge at a time.