Prime numbers/Program/Only addition/Exercise

Write a computer-program (in pseudocode) which decides for a given natural number ${}n\geq 2$ whether ${}n$ is a prime number or not.

• The computer has as many memory units as needed, which can contain natural numbers.
• It can empty memory units.
• It can increase the content of a memory unit by ${}1$.
• It can add the content of two memory units and write the result into another memory unit.
• It can compare the content of memory units and can, depending on the outcome, switch to a certain program line.
• It can print contents of memory units and it can print given texts.
• There is a stop command.

The initial configuration is

$(n,0,0,0,0,0,0,\ldots )$

with ${}n\geq 2$. The program is supposed to print "${}n$ is a prime number“ or "${}n$ is not a prime number“ and then stop.

Create a solution