import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

class Main {
	public static void main(String[] args) throws Exception {
		new Main().run();
	}

	void run() {
		Scanner sc = new Scanner(System.in);
        int T=sc.nextInt();
        for(int i=0;i<T;++i){
			long p=sc.nextLong();
			long k=sc.nextLong();
			long a=sc.nextLong();
			long root = kth_root(a,k,p);
			System.out.println(root);
        }
	}
	
	long kth_root(long a,long k,long p){
		long g=gcd(k,p-1);
		if(pow(a,(p-1)/g,p)!=1)return -1;
		a=pow(a,inv(k/g,(p-1)/g),p);
		for(long div=2;div*div<=g;++div) {
			int sz=0;
			while(g%div==0) {
				g/=div;
				++sz;
			}
			if(sz>0) {
				long b=peth_root(a,div,sz,p);
				a=b;
			}
		}
		if(g>1)a=peth_root(a,g,1,p);
		return a;
	}
	
	// (p^e)x=a in Z/(p^s)Z×Z/qZ
	// mod=q(p^s)
	long peth_root(long a,long p,int e,long mod) {
		long q=mod-1;
		int s=0;
		while(q%p==0){q/=p;++s;}
		long ans=pow(a,(inv(q,p)*(p-1)%p*q+1)/p,mod);
		long c=2;
		while(pow(c,(mod-1)/p,mod)==1)++c;
		c=pow(c,q,mod);
		while(true){
			long err=pow(ans,p,mod)*inv(a,mod)%mod;
			int bit=s-cnt(err,p,mod);
			if(bit==s)break;
			ans=ans*pow(c,pow(p,bit-1,mod),mod)%mod;
		}
		return ans;
	}
	
	int cnt(long a,long base,long p){
		int ret=0;
		while(a!=1){
			a=pow(a,base,p);
			++ret;
		}
		return ret;
	}
	
	long inv(long a,long p){
		a%=p;
		long u=1,v=0;
		long b=p;
		while(b>0) {
			long q=a/b;
			a%=b;
			u-=v*q%p;
			u%=p;
			{
				u^=v;v^=u;u^=v;
				a^=b;b^=a;a^=b;
			}
		}
		return (u%p+p)%p;
	}
	
	long pow(long a,long n,long p){
		n%=p-1;
		long r=1;
		for(;n>0;n>>=1,a=a*a%p)if(n%2==1)r=r*a%p;
		return r;
	}
	
	long gcd(long a,long b) {
		return a==0?b:gcd(b%a,a);
	}
	
	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}