realloc() : invalid next size making p_thread program - linux

Question

I am attempting to make a multithreaded program that computes the prime-factor of each input(each input having its own thread). Using realloc or calloc with a int* Name, inputing large numbers or lots of thread {1..100} gives me realloc:invalid size or malloc.c failure. I am not sure if it is a deep pointer issue, but I need an output of such:
./thread {1..10}
1:
2: 2
3: 3
4: 2 2
5: 5
etc....
10: 2 5
int size = 5;
int* primeNumbers = (int*)calloc(size,sizeof(int));
int n = atoi(param);
//sum = 0;
int counter = 0;
//Add original value to int* primeNumbers for return printing
primeNumbers[counter] = n;
counter++;
while (n % 2 == 0)
{
printf("%d ", 2);
//If max allocated memory is reached, double memory size
if (counter == size)
{
size = size * 2;
primeNumbers = realloc(primeNumbers,size*sizeof(int));
primeNumbers[size] = 0;
}
primeNumbers[counter] = 2;
counter++;
n = n/2;
}
for (int i = 3; i <= sqrt(n); i = i + 2)
{
while (n % i == 0)
{
printf("%d ",i);
//If max allocated memory is reached, double memory size
if (counter == size)
{
size = size * 2;
primeNumbers = realloc(primeNumbers,size*sizeof(int));
primeNumbers[size] = 0;
}
primeNumbers[counter] = i;
counter++;
n = n/i;
}
}
enter code here