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Bignum

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A bignum system in a computer or program allows internal representation of arbitrarily large integers or arbitrarily precise rational numbers, by storing numbers as digit lists which can grow using dynamically allocated memory. First implemented in MacLISP, it is implemented in most modern lisps and in many other languages (Java, Ruby, Python). The VAX/VMS operating system offered bignum facilities as a collection of string functions. The GNU Multi-Precision Library is a free C library that offers bignum features. All computer algebra systems contain bignum facilities.