c# - Handling very large number in .net

Question

Is there any library to handle numbers bigger than that a BigInteger in .net can handle? Using BigInteger I could calculate the fibonacci series up to 3226th term. How to calculate more terms? Is there a way to join two BigInteger when an overflow occurs? Looking for your help.

Answer 1

使用BigInteger处理 .Net 中的未知大数，没有其他方法。如果它溢出了，这个数字简直太大了，无法处理，看不到：

因为 BigInteger 类型是不可变的（请参阅 Mutability 和 BigInteger 结构）并且因为它没有上限或下限，所以对于导致 BigInteger 值增长过大的任何操作都可能引发 OutOfMemoryException。

Answer 2

我认为问题是你的，而不是BigInteger：

BigInteger prev2 = 1;
BigInteger prev1 = 1;

int i = 3;

while (true)
{
    BigInteger fi = prev2 + prev1;
    Console.WriteLine("{0}th: {1}", i, fi);
    prev2 = prev1;
    prev1 = fi;
    i++;
}

它毫无问题地到达第 300000 个。