#!/usr/bin/perl


##################################
### To find the largest prime! ###
###     by Azerton 2004        ###
##################################

system(clear);

#ASK FOR INPUT
print "Created by Azerton, 2004\n";
print "I will calculate the primes from 1 to the number you enter. Wha
+t is the maximum number to check?\n";
START:
$max=<STDIN>;  #max value to calculate
if ($max<=1){
die "Negatives or 0 not allowed!\n";
}


$getal=$max+1; #I use this now
$teller=0; # A/B would give A in this case
$deeltal=2; # A/B would give B in this case



for ($max;$getal-=1;$getal>=0)
{

#$getal -=1; Check if it's a prime, by going down 1 value
$deeltal=2;
$teller=0;
        while($getal % $deeltal!=0 && $deeltal+2<=$getal){
            $teller+=1;
            $deeltal+=1;

        } #important while: closed

        if($teller+3==$getal){
        push(@priemlijst,$getal);
        } else
        {
        #Don't you dare to do anything
        } #We don't have a prime, too bad

} # Close main for
system (clear);
push(@priemlijst,2); #Don't forget number 2!
@priemlijst=reverse(@priemlijst); #Tidy the room
print "The primes from  1 to $max are : @priemlijst \n";

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