1000000 elements - acceptet but 100000 - not
I dont understand
stream on 256 KB - is for 64-bit numbers maximum 32768 elements

Have you seen sample? Have you seen any 64-bit binary input?
Input is text. 256Kb is size of input text.

The least possible size of number _in_text_form_ is 2 bytes: "1 ".
So max input size in numbers is 256K/2 = 128K numbers.

(: thank