
theorem
  2083 is prime
proof
  now
    2083 = 2*1041 + 1; hence not 2 divides 2083 by NAT_4:9;
    2083 = 3*694 + 1; hence not 3 divides 2083 by NAT_4:9;
    2083 = 5*416 + 3; hence not 5 divides 2083 by NAT_4:9;
    2083 = 7*297 + 4; hence not 7 divides 2083 by NAT_4:9;
    2083 = 11*189 + 4; hence not 11 divides 2083 by NAT_4:9;
    2083 = 13*160 + 3; hence not 13 divides 2083 by NAT_4:9;
    2083 = 17*122 + 9; hence not 17 divides 2083 by NAT_4:9;
    2083 = 19*109 + 12; hence not 19 divides 2083 by NAT_4:9;
    2083 = 23*90 + 13; hence not 23 divides 2083 by NAT_4:9;
    2083 = 29*71 + 24; hence not 29 divides 2083 by NAT_4:9;
    2083 = 31*67 + 6; hence not 31 divides 2083 by NAT_4:9;
    2083 = 37*56 + 11; hence not 37 divides 2083 by NAT_4:9;
    2083 = 41*50 + 33; hence not 41 divides 2083 by NAT_4:9;
    2083 = 43*48 + 19; hence not 43 divides 2083 by NAT_4:9;
  end;
  then for n being Element of NAT st 1 < n & n*n <= 2083 & n is prime
  holds not n divides 2083 by XPRIMET1:28;
  hence thesis by NAT_4:14;
end;
