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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: GR_CY_3:21</font></span><br/></a><div class="add"> <a href="gr_cy_3.html#K1" title="GR_CY_3:func.1">Mersenne</a> 7 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 127</div></div>
