var GET=(function(){function f(s){return new g(s);}function g(s){this._s=s.trim().split("\n");this._y=0;}g.prototype.a=function(f){var s=this._s, y=this._y, r;if(typeof s[y]==="string")s[y]=s[y].split(" ").reverse();r=s[y].pop();if(!s[y].length)this._y++;return f?r:+r;};g.prototype.l=function(f){var s=this._s[this._y++].split(" ");return f?s:s.map(a=>+a);};g.prototype.m=function(n,f){var r=this._s.slice(this._y,this._y+=n).map(a=>a.split(" "));return f?r:r.map(a=>a.map(a=>+a));};g.prototype.r=function(n,f){var r=this._s.slice(this._y,this._y+=n);return f?r:r.map(a=>+a);};return f;})();
var o=GET(require("fs").readFileSync("/dev/stdin","utf8"));
function xArray(v){var a=arguments,l=a.length,r="Array(a["+--l+"]).fill(v)";while(--l)r="Array(a["+l+"]).fill(0).map(x=>"+r+")";return eval(r);}
var mod = 1e9+7;
function abmod(){for(var a=arguments,r=a[0],i=1;i<a.length;)r=((r>>16)*a[i]%mod*65536+(r&65535)*a[i++])%mod;return r;}
var fact=[1,1];
function modinv(a){for(var b=mod,u=1,v=0,t;b;v=t)t=a/b|0,a-=t*b,u-=t*v,t=a,a=b,b=t,t=u,u=v;u%=mod;return u<0?u+mod:u;}
var inv = [1,1];

console.log(main());
function main(){
  var n = o.a();
  var x = o.a();
  var s = o.l().sort((a,b)=>a-b);
  var ans = 0;
  for(var i = 2; i <= n; i++){
    fact[i] = abmod(fact[i-1],i);
    inv[i] = modinv(i);
  }
  for(var i = 0; i < n; i++){
    ans += f(x%s[i],i,fact[n-1]);
    ans %= mod;
  }
  return ans;

  function f(x,a,b){
    if(a === 0 || x < s[0])return abmod(x,b);
    var z = 0;
    for(var i = 1; i <= a; i++){
      while(x < s[a-1])a--;
      z += f(x%s[a-i],a-i,abmod(inv[a],b));
    }
    return z % mod;
  }
}