Sophie: php-manual-pt_BR-5.2.4-1mdv2008.1 noarch

php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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>gmp_prob_prime</H1
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>    (PHP 4 &#62;= 4.0.4, PHP 5)</P
>gmp_prob_prime&nbsp;--&nbsp;Check if number is "probably prime"</DIV
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>Description</H2
>int <B
CLASS="methodname"
>gmp_prob_prime</B
> ( resource a [, int reps] )<BR
></BR
><P
>&#13;     If this function returns 0, <CODE
CLASS="parameter"
>a</CODE
> is
     definitely not prime. If it returns 1, then
     <CODE
CLASS="parameter"
>a</CODE
> is "probably" prime.  If it returns 2,
     then <CODE
CLASS="parameter"
>a</CODE
> is surely prime. Reasonable values
     of <CODE
CLASS="parameter"
>reps</CODE
> vary from 5 to 10 (default being
     10); a higher value lowers the probability for a non-prime to
     pass as a "probable" prime.
    </P
><P
>&#13;     The function uses Miller-Rabin's probabilistic test.
    </P
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><B
>Exemplo 1. <B
CLASS="function"
>gmp_prob_prime()</B
> example</B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// definitely not a prime<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_prob_prime</font><font color="#007700">(</font><font color="#DD0000">"6"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// probably a prime<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_prob_prime</font><font color="#007700">(</font><font color="#DD0000">"1111111111111111111"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// definitely a prime<br /></font><font color="#007700">echo </font><font color="#0000BB">gmp_prob_prime</font><font color="#007700">(</font><font color="#DD0000">"11"</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><P
>&#13;      The printout of the above program will be:
     </P
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1
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