HugeMotherFuckingInt

I'm trying to write a HugeMotherFuckingInt processing library in C.

My first try, I stored the numbers as a char[] and computed them using basic arithmetic.

My second try, I stored the numbers as unsigned long char[]. This proved to be a faster, easier and clearer approach.

Still though, it seems to be a bit too slow.

What other data structures might result in faster execution of basic arithmetic +/*-?

Also, are there any algorithms to speed up the arithmetic operations themselves?

hmm? i don't quite follow.. Signed ints Aren't easier??
Better not forget this bit (InitArrays // Zero) >>

//----------------------------------

void Zero(int xa[]){
int i;
for(i=0;i<=RRay;i++) xa[i] = 0;
}

//----------------------------------