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<div><span class="kw">theorem </span><a NAME="T18"><span class="comment"><font color="firebrick">:: NUMBER09:18</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">a</font>, <font color="Olive" title="b2">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a>  st <font color="Olive" title="b1">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> 1 &amp; <font color="Olive" title="b1">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b2">n</font> &amp;  not <font color="Olive" title="b1">a</font> is  <a href="int_2.html#V1" title="INT_2:attr.1">prime</a>  &amp; <font color="Olive" title="b1">a</font> <a href="int_1.html#R1" title="INT_1:pred.1">divides</a> <font color="Olive" title="b2">n</font> holds <br/><font color="Olive" title="b2">n</font> is  <a href="number09.html#NV2" title="NUMBER09:NV.2">not_a_product_of_two_primes</a>  <span class="kw">by</span> <span class="lab"><a class="ref" href="gr_cy_3.html#T1" onmouseover="rs('gr_cy_3/T1')" onmouseout="rh()">GR_CY_3:1</a></span>;<br/></div></div>
