32 lines
589 B
PHP
32 lines
589 B
PHP
<?php
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function is_prime($prime) {
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if($prime == 1)
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return true;
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if($prime == 2)
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return true;
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$sqrt = sqrt($prime);
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for ($i = 3; $i <= $sqrt; $i+=2){
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if ($prime%$i == 0) return false;
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}
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return true;
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}
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$high = 0;
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$max_primes = 0;
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for($a=-999; $a<1000; $a++) {
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for($b=-999; $b<1000; $b=$b+2) {
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$n=0;
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while(true) {
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echo $n*$n + $a * $n + $b . "\n";
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if(!is_prime($n*$n + $a * $n + $b)) {
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if($n > $max_primes) {
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$max_primes = $n;
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echo "max: $n a: $a b: $b\n";
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}
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break;
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}
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$n++;
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}
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}
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} |