100825/tex/sh100325prim.sh

#!/bin/bash

# (c) David Vajda
# Primzahl check from 255 ...
# 10/03/25

echo "(c) David Vajda"
echo "Primzahl check from 255 ..."
echo "10/03/25"


y=255
x=0
while [ $y -gt 0 ]
do
    x=$(($y-1))
    while [ $x -gt 1 ]
    do
        if [ $(($y%$x)) -eq 0 ]
        then
            break
        fi
        x=$(($x-1))
    done
    if [ $x -eq 1 ]
    then
        echo "$y ist eine primazahl"
        break
    fi
    y=$(($y-1))
done

exit