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26 lines
520 B
PHP

<?php
/*
* Gnieark's anwser to euler problem 10
* https://projecteuler.net/problem=10
*/
$primesNumbers=array(2);//ommit 1
$i=3;
$sum=2;
while($i<2000000){
$isPrimaryNumber=true;
$index=0;
while(($primesNumbers[$index]<=sqrt($i)) && $index < count($primesNumbers)){
if(fmod($i,$primesNumbers[$index])==0){
$isPrimaryNumber=false;
break;
}
$index++;
}
if($isPrimaryNumber){
$primesNumbers[]=$i;
$sum+=$i;
}
$i=$i+2;
}
echo $sum;