Php/docs/function.gmp-nextprime
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gmp_nextprime
(PHP 5 >= 5.2.0, PHP 7)
gmp_nextprime — Find next prime number
返回值
Return the next prime number greater than a
,
as a GMP number.
范例
Example #1 gmp_nextprime() example
<?php$prime1 = gmp_nextprime(10); // next prime number greater than 10$prime2 = gmp_nextprime(-1000); // next prime number greater than -1000echo gmp_strval($prime1) . "\n";echo gmp_strval($prime2) . "\n";?>
以上例程会输出:
11 2
注释
Note:
This function uses a probabilistic algorithm to identify primes and chances to get a composite number are extremely small.