calcMod-Light

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 !
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