
theorem
  7591 is prime
proof
  now
    7591 = 2*3795 + 1; hence not 2 divides 7591 by NAT_4:9;
    7591 = 3*2530 + 1; hence not 3 divides 7591 by NAT_4:9;
    7591 = 5*1518 + 1; hence not 5 divides 7591 by NAT_4:9;
    7591 = 7*1084 + 3; hence not 7 divides 7591 by NAT_4:9;
    7591 = 11*690 + 1; hence not 11 divides 7591 by NAT_4:9;
    7591 = 13*583 + 12; hence not 13 divides 7591 by NAT_4:9;
    7591 = 17*446 + 9; hence not 17 divides 7591 by NAT_4:9;
    7591 = 19*399 + 10; hence not 19 divides 7591 by NAT_4:9;
    7591 = 23*330 + 1; hence not 23 divides 7591 by NAT_4:9;
    7591 = 29*261 + 22; hence not 29 divides 7591 by NAT_4:9;
    7591 = 31*244 + 27; hence not 31 divides 7591 by NAT_4:9;
    7591 = 37*205 + 6; hence not 37 divides 7591 by NAT_4:9;
    7591 = 41*185 + 6; hence not 41 divides 7591 by NAT_4:9;
    7591 = 43*176 + 23; hence not 43 divides 7591 by NAT_4:9;
    7591 = 47*161 + 24; hence not 47 divides 7591 by NAT_4:9;
    7591 = 53*143 + 12; hence not 53 divides 7591 by NAT_4:9;
    7591 = 59*128 + 39; hence not 59 divides 7591 by NAT_4:9;
    7591 = 61*124 + 27; hence not 61 divides 7591 by NAT_4:9;
    7591 = 67*113 + 20; hence not 67 divides 7591 by NAT_4:9;
    7591 = 71*106 + 65; hence not 71 divides 7591 by NAT_4:9;
    7591 = 73*103 + 72; hence not 73 divides 7591 by NAT_4:9;
    7591 = 79*96 + 7; hence not 79 divides 7591 by NAT_4:9;
    7591 = 83*91 + 38; hence not 83 divides 7591 by NAT_4:9;
  end;
  then for n being Element of NAT st 1 < n & n*n <= 7591 & n is prime
  holds not n divides 7591 by XPRIMET1:46;
  hence thesis by NAT_4:14;
end;
