The two numbers are prime numbers, and the two product is 217. how can we solve this problem?

Two numbers are prime numbers, two product is 217, and the two numbers are prime numbers. The two product is 217. solve this problem ------------------ factorization (sieve) PHPcodefunctionFactorization ($ num) {$ endsqrt ($ num); $ k1; for ($ i2; $ I & lt; $ end; $ I + $ k, $ two numbers are prime numbers. The product of two numbers is 217.
Two numbers are prime numbers, and the product of two numbers is 217.

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Factorization (screening)

PHP code

Function Factorization ($ num) {$ end = sqrt ($ num); $ k = 1; for ($ I = 2; $ I <= $ end; $ I + = $ k, $ k = 2) {if ($ num % $ I) = 0) {while ($ num % $ I) = 0) {$ num/= $ I; $ r [] = $ I ;}$ end = sqrt ($ num) ;}} if ($ num> 1) $ r [] = $ num; return $ r;} print_r (Factorization (217 ));
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Let's try it out...
For ($ I = 1; $ I <(217/2 + 1); $ I ++)
{
$ V = 217/$ I;
If ($ v % 2 = 1 & $ I % 2 = 1)
{
Break;
}
}
Echo "$ v * $ I = 217; and $ v $ I is a prime number .";
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