CoCalc -- min.170

GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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#g1 
6	% generator
 1 0 0 0 0 0
 0 1 0 0 0 0
 0 0 1 0 0 0
 0 0 0 1 0 0
 0 0 0 0 1 0
 0 0 0 0 0 1