Vectorizing for loops - an efficient way to do it

Hi, i want to know how should i vectorize two loops like this:

length=100000;
limit=8;

j=primes(9000);
j=j(randperm(limit));
d=j(randperm(limit)); 

X=zeros([1,length]);
X(1)=1;

for k=1:length-1
for p=0:limit-1
X(k+1)=X(k+1)+ power(-1,-p+1)*j(p+1)*X(k-p); 
end
X(k+1)=rem(abs(X(k+1)),m); 
end
I'm looking for an efficient way cause i've to traduce this code for gpu. I've also a big amount of data.
Thank u.