The .net framework 4 is apparently going to include a BigInteger class. However, I can't seem to find out whether or not it will be immutable. I also can't seem to decide whether or not that would be a good thing. Immutability has a ton of benefits, especially for something as "value-like" as a big-int. On the other hand, the basic oper...
How do I handle big integers in C#? I have a function that will give me the product of divisors: private static int GetDivisorProduct(int N, int product) { for (int i = 1; i < N; i++) { if (N % i == 0) { Console.WriteLine(i.ToString()); product *= i; ...
Hi, When I try to find the value of BigInteger data type for 2 to power 23,000, I am not able to see the value. Upto 2 to power 22000, I could display the biginteger value . I am on XP. Any solution/suggestion? Sastry ...
I've been toying around with some Project Euler problems and naturally am running into a lot that require the handling of bigger than long long type numbers. I am committed to using Cocoa and Objective-C (I need to stay sharp for work) but can't find an elegant way (read: library) to handle these really big numbers. I'd love to use GMP...
I'm looking for a c++ class/library that provides 1024 bit and bigger integers and bit operations like: - bit shifting, - bitwise OR/AND, - position first zero bit speed is crucial, so it would have to be implemented with some SIMD assembly. ...
Multiplication of two n-bit numbers A and B can be understood as a sum of shifts: (A << i1) + (A << i2) + ... where i1, i2, ... are numbers of bits that are set to 1 in B. Now lets replace PLUS with OR to get new operation I actually need: (A << i1) | (A << i2) | ... This operation is quite similar to regular multiplication for ...
I want to print all the prime numbers between two numbers. This is my code: package sphere; import java.math.BigInteger; import java.io.*; class PrimeTest2 { public static void main(String args[]) throws java.lang.Exception { BufferedReader r = new BufferedReader(new InputStreamReader(System.in)); String s = r.read...
Fairly easy, if the BigInteger number is 543 I want it to cut off the last digit so that it is 54. Two easy ways to do this can be : Use strings, get substring and create new biginteger with the new value. Use BigIntegers divide method with number 10. ( 543 / 10 = 54.3 => 54 ) The thing is I will be performing this a lot of times wi...
Hugs> 94535^445 13763208823213770506960538876615156211048901640052821530697264247739998018468419032448277029434879827074549660094560167350418780006041435009085328874649203806051649321126870390595266721098189242349208444482316125325707186571602341772853777338301048340410490766099124882372196084459950728677984306149354032194958838350428628...
I'm trying to learn C and have come across the inability to work with REALLY big numbers (i.e., 100 digits, 1000 digits, etc.). I am aware that there exist libraries to do this, but I want to attempt to implement it myself. I just want to know if anyone has or can provide a very detailed, dumbed down explanation of arbitrary-precision a...
Can anyone provide code for a biginteger implementation in objective-c that provides a PowMod function ? ...
I have a RSA Exponent key value which is supposed to be a biginteger but i have it in NSString/NSdata with full value in(UTF8 encoded) as Part of RSA encryption , i need to do the following in the Iphone Env I need to find the bit length of the above exponent value I need to do arithmatic operations on exponent and modulus values incl...
I need some help deciding what is better performance wise. I'm working with bigints (more then 5 million digits) and most of the computation (if not all) is in the part of doubling the current bigint. So i wanted to know is it better to multiply every cell (part of the bigint) by 2 then mod it and you know the rest. Or is it better just...
Needing a quick way to build an ActiveX control out of some Java code, I tried out Visual J# Express. Ran into a limitation, though, when I found that BigInteger.modPow is really slow, and since my Java code verifies a number of DSA signatures, operations that normal would take a few milliseconds were taking seconds. Was wondering if a...
What would be the best way to convert a 50-digit String to a BigInteger in Java? It doesn't have a valueOf(String) method, and I can't convert to Long because it's too small. ...
I´m using Delphi 7 with devart dbExpress to connect to SQLServer. The problem is that when I add a bigInt field to a ClientQuery it comes as TFMTBCDField. And the TFMTBCDField don´t have a method to get the 64 bit value. I can use the Field.AsVariant or the StrToInt64(Field.AsString) to pick this 64 bits value. Is there a better way t...
Does emacs have support for big numbers that don't fit in integers? If it does, how do I use them? ...
Consider the following: print 3 ** 333; #Yields 7.6098802313206e+158 My question is simple: How can I disable scientific notation when working with very large numbers? Basically, I'd like to see all the digits dumped to stdout verbatim. Is this possible? ...
xrange function doesn't work for large integers: >>> N = 10**100 >>> xrange(N) Traceback (most recent call last): ... OverflowError: long int too large to convert to int >>> xrange(N, N+10) Traceback (most recent call last): ... OverflowError: long int too large to convert to int Python 3.x: >>> N = 10**100 >>> r = range(N) >>> r = r...
how to declare int1024 in C#? i can use VB or C++ Too. Regards Behrooz ...