#include<stdio.h>
 
int sosu(int s){
    int flag=0,cnt=0;
    for(int j=2;j<s;j++){ //2에서 s-1까지 나누기
        if(s%j==0){ flag=0; break;} // 나눠지면 종료
        else flag=1; //아니면 flag 세움
    } if(flag==1) return s; //flag가 1이면 s는 소수
}
 
int main() {
    int M,N,sum=0,min=10000,cnt=0;
 
    scanf("%d%d",&M,&N);
 
    for(int i=M;i<=N;i++){
        if(i==0||i==1) continue;
        else { sum+=sosu(i); if(sosu(i)!=0&&sosu(i)<min) min=sosu(i); }
        //printf("%d %d %d\n",i,sum,cnt); //이건 시험용 코드
    }
    if(sum==0)printf("-1");
    else printf("%d\n%d",sum,min);
}

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