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<p>&nbsp;<p>
<hr noshade size="5">
<h2><a name="IsPrime"></a>
IsPrime
</h2>

Returns <tt> true</tt> iff the argument is either a
prime number or a prime ideal.

<p><p>

<h3>
Syntax:
</h3>
<pre>b := IsPrime(x);</pre>

<p>

<table>
<tr>
<td>boolean</td>
<td><pre>  b  </pre></td>
<td></td>
</tr>
<tr>
<td></td>
<td><pre>  x  </pre></td>
<td></td>
</tr>
</table>

<p>


<h3>
Description:
</h3>
<i>no detailed description available yet</i>

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
First some rational integers 
<pre>

kash> IsPrime(1997);
true
kash> IsPrime(4);
false


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>

Now some ideals in Q(\sqrt3) 
<pre>

kash> o := Order(Z, 2, 3);;
kash> OrderMaximal(o);;
kash> IsPrime(5*o);
true
kash> IsPrime(6*o);
false
kash> IsPrime(Factor(6*o)[1][1]);
> true

</pre>

<p>


<hr>

<p>
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