theorem Th9:
  8|^10+1 = (1073*100+74)*10000+1825 :: 1 073 741 825
  proof
    thus 8|^10+1 = 8*8*8*8*8*8*8*8*8*8+1 by NUMBER02:6
    .= (1073*100+74)*10000+1825;
  end;
