Can I Use Big Integers in C# with GMP on Windows?

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To work with arbitrarily long integers in C#, users can utilize third-party libraries since Microsoft does not provide a built-in solution. A recommended resource is the BigInteger class available on CodeProject, which offers functionality for handling large numbers. However, performance may be an issue, particularly for numbers exceeding 30 digits, similar to the Java BigNumber implementation. For improved performance, users can consider installing the GNU Multiple Precision Arithmetic Library (gmp), which can be compiled into a gmp.dll for use on Windows. This library is noted for its superior handling of large integers compared to other options.
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I want to use arbitrarily long integers in Csharp, can you tell me how to declare and use this. Please explain the namespace, classes used as I'm very new to this. Thanks.
 
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I don't think Microsoft has anything for this at the moment. You should be able to Google up third-party classes for big numbers, though; http://www.codeproject.com/csharp/biginteger.asp would be an example.

Frankly, it's no better than the Java BigNumber implementation, which also has poor performance for large numbers (> 30 digits, say).
 
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You can backdoor install gmp - the GNU package for large numbers. It's possible to compile a gmp.dll that you can use in Windows. See:

http://cs.nyu.edu/exact/core/gmp/
 
jim mcnamara said:
You can backdoor install gmp - the GNU package for large numbers. It's possible to compile a gmp.dll that you can use in Windows.

Oh yes, this is much better.
 

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