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Dokumen ini menggunakan Manual laman web PHP Cina Lepaskan
(PHP 5, PHP 7 >= 5.2.0)
gmp_nextprime — Find next prime number
$a
)Find next prime number
a
可以是一个 GMP 数据 resouce ,或一个可以转换为数值的字符串。
Return the next prime number greater than a
,
as a GMP number.
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 -1000
echo gmp_strval ( $prime1 ) . "\n" ;
echo gmp_strval ( $prime2 ) . "\n" ;
?>
以上例程会输出:
11 -997
Note:
This function uses a probabilistic algorithm to identify primes and chances to get a composite number are extremely small.