reserve a,b,i,k,m,n for Nat;
reserve s,z for non zero Nat;
reserve r for Real;
reserve c for Complex;
reserve e1,e2,e3,e4,e5 for ExtReal;

theorem Th8:
  7|^10+1 = (2824*10000+7525) * 10 :: 282 475 250
  proof
    thus 7|^10+1 = 7*7*7*7*7*7*7*7*7*7+1 by NUMBER02:6
    .= (2824*10000+7525) * 10;
  end;
