return soup(i-1)+soup(i-2);

I want to print the first number in the Fibonacci sequence to contain over 1000 digits. I got fibbonaci to work but I cannot seem to figure out how to implement the "Contain over 1000 digits".

Do I make a list to store the fibbonaci numbers in then do a statement?

My Python 3 Code:

def fibonacci(num):
if num == 2 or num ==1:
return 1
return sum([fibonacci(num - 2), fibonacci(num - 1)])

print(fibonacci(7))