说明：  基于记忆体的有效运用，程式语言中规定了各种不同的资料型态，也因此变数所可以表达的最大整数受到限制，例如123456789123456789这样的整数就不可能储存在long变数中（例如C/C++等），我们称这为long数，这边翻为超长整数（避免与资料型态的长整数翻译混淆），或俗称大数运算。
(Effective use of memory-based, programming language provides a variety of data types, variables and therefore the largest integer can be expressed by constraints such 123456789123456789 such long integer can not be stored in the variable (eg C/C++ etc.), we call this the long number, here turned to long integer (to avoid the long integer data type translation mix), or commonly known as the large numbers operation.)