
theorem
  9631 is prime
proof
  now
    9631 = 2*4815 + 1; hence not 2 divides 9631 by NAT_4:9;
    9631 = 3*3210 + 1; hence not 3 divides 9631 by NAT_4:9;
    9631 = 5*1926 + 1; hence not 5 divides 9631 by NAT_4:9;
    9631 = 7*1375 + 6; hence not 7 divides 9631 by NAT_4:9;
    9631 = 11*875 + 6; hence not 11 divides 9631 by NAT_4:9;
    9631 = 13*740 + 11; hence not 13 divides 9631 by NAT_4:9;
    9631 = 17*566 + 9; hence not 17 divides 9631 by NAT_4:9;
    9631 = 19*506 + 17; hence not 19 divides 9631 by NAT_4:9;
    9631 = 23*418 + 17; hence not 23 divides 9631 by NAT_4:9;
    9631 = 29*332 + 3; hence not 29 divides 9631 by NAT_4:9;
    9631 = 31*310 + 21; hence not 31 divides 9631 by NAT_4:9;
    9631 = 37*260 + 11; hence not 37 divides 9631 by NAT_4:9;
    9631 = 41*234 + 37; hence not 41 divides 9631 by NAT_4:9;
    9631 = 43*223 + 42; hence not 43 divides 9631 by NAT_4:9;
    9631 = 47*204 + 43; hence not 47 divides 9631 by NAT_4:9;
    9631 = 53*181 + 38; hence not 53 divides 9631 by NAT_4:9;
    9631 = 59*163 + 14; hence not 59 divides 9631 by NAT_4:9;
    9631 = 61*157 + 54; hence not 61 divides 9631 by NAT_4:9;
    9631 = 67*143 + 50; hence not 67 divides 9631 by NAT_4:9;
    9631 = 71*135 + 46; hence not 71 divides 9631 by NAT_4:9;
    9631 = 73*131 + 68; hence not 73 divides 9631 by NAT_4:9;
    9631 = 79*121 + 72; hence not 79 divides 9631 by NAT_4:9;
    9631 = 83*116 + 3; hence not 83 divides 9631 by NAT_4:9;
    9631 = 89*108 + 19; hence not 89 divides 9631 by NAT_4:9;
    9631 = 97*99 + 28; hence not 97 divides 9631 by NAT_4:9;
  end;
  then for n being Element of NAT st 1 < n & n*n <= 9631 & n is prime
  holds not n divides 9631 by XPRIMET1:50;
  hence thesis by NAT_4:14;
end;
