GeoGebra
You can use GeoGebra to check if a number is prime, or to find prime numbers. This can be especially useful with large numbers where it can be difficult to figure out if they are prime or not.
GeoGebra Instruction 1
Checking If a Number Is Prime
- 1.
- Open
Algebra Viewunder
Viewin
Menu. - 2.
- Use the command
IsPrime(<Number>)
by typing it in
Algebra Viewand inserting your number in the<Number>field.-
If
GeoGebrareturnstrue, that means your number is a prime number. -
If
GeoGebrareturnsfalse, that means that your number is not a prime number.
-
- 3.
- If your number is not a prime number, you can use the command
PrimeFactors(<Number>)
to find the prime factors of your number.
GeoGebra Instruction 2
Finding Prime Numbers
Open Algebra View under View in Menu.
-
If you have a number—no matter if it’s prime or not—and you want to find the closest prime number that is bigger than your number, use the command
NextPrime(<Number>).
-
If you have a number—no matter if it’s prime or not—and you want to find the closest prime number that is smaller than your number, use the command
PreviousPrime(<Number>).
