
theorem
  8273 is prime
proof
  now
    8273 = 2*4136 + 1; hence not 2 divides 8273 by NAT_4:9;
    8273 = 3*2757 + 2; hence not 3 divides 8273 by NAT_4:9;
    8273 = 5*1654 + 3; hence not 5 divides 8273 by NAT_4:9;
    8273 = 7*1181 + 6; hence not 7 divides 8273 by NAT_4:9;
    8273 = 11*752 + 1; hence not 11 divides 8273 by NAT_4:9;
    8273 = 13*636 + 5; hence not 13 divides 8273 by NAT_4:9;
    8273 = 17*486 + 11; hence not 17 divides 8273 by NAT_4:9;
    8273 = 19*435 + 8; hence not 19 divides 8273 by NAT_4:9;
    8273 = 23*359 + 16; hence not 23 divides 8273 by NAT_4:9;
    8273 = 29*285 + 8; hence not 29 divides 8273 by NAT_4:9;
    8273 = 31*266 + 27; hence not 31 divides 8273 by NAT_4:9;
    8273 = 37*223 + 22; hence not 37 divides 8273 by NAT_4:9;
    8273 = 41*201 + 32; hence not 41 divides 8273 by NAT_4:9;
    8273 = 43*192 + 17; hence not 43 divides 8273 by NAT_4:9;
    8273 = 47*176 + 1; hence not 47 divides 8273 by NAT_4:9;
    8273 = 53*156 + 5; hence not 53 divides 8273 by NAT_4:9;
    8273 = 59*140 + 13; hence not 59 divides 8273 by NAT_4:9;
    8273 = 61*135 + 38; hence not 61 divides 8273 by NAT_4:9;
    8273 = 67*123 + 32; hence not 67 divides 8273 by NAT_4:9;
    8273 = 71*116 + 37; hence not 71 divides 8273 by NAT_4:9;
    8273 = 73*113 + 24; hence not 73 divides 8273 by NAT_4:9;
    8273 = 79*104 + 57; hence not 79 divides 8273 by NAT_4:9;
    8273 = 83*99 + 56; hence not 83 divides 8273 by NAT_4:9;
    8273 = 89*92 + 85; hence not 89 divides 8273 by NAT_4:9;
  end;
  then for n being Element of NAT st 1 < n & n*n <= 8273 & n is prime
  holds not n divides 8273 by XPRIMET1:48;
  hence thesis by NAT_4:14;
end;
