biginteger

Is there a BigInteger class in PHP? If so, how do I access it or use it? Hopefully helpfull links : http://php.net/manual/en/ref.bc.php http://php.net/manual/en/ref.gmp.php EDIT: Math_BigInteger Example from http://phpseclib.sourceforge.net/documentation/math.html : Implements an arbitrary precision integer arithmetic library. Uses gmp or bcmath, if available, and an internal implementation, otherwise. <?php include('Math/BigInteger.php'); $a = new Math_BigInteger(2); $b = new Math_BigInteger(3); $c = $a->add($b); echo $c->toString(); // outputs 5 ?> Even though this question is old, it comes

In Java, I could do BigInteger b = new BigInteger(500); Then format it as I pleased b.toString(2); //binary b.toString(8); //octal b.toString(10); //decimal b.toString(16); //hexadecimal In C#, I can do int num = int.Parse(b.ToString()); Convert.ToString(num,2) //binary Convert.ToString(num,8) //octal etc. But I can only do it with long values and smaller. Is there some method to print a BigInteger with a specified base? I posted this, BigInteger Parse Octal String? , yesterday and received the solution of how to convert basically all strings to BigInteger values, but haven't had success

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. There are several, including GMP , but for speed, the best is likely TTmath . TTmath's design decision to use templated fixed lengths at compiletime lets it be quite fast. try gmp library . It is a C library. Beginning with GMP 4.0 a C++ wrapper is bundled with the release. Just consider the big integer multiplication, the TTmath Library use Karatsuba

I'm trying to work through the problems on projecteuler.net but I keep running into a couple of problems. The first is a question of storing large quanities of elements in a List<t> . I keep getting OutOfMemoryException's when storing large quantities in the list. Now I admit I might not be doing these things in the best way but, is there some way of defining how much memory the app can consume? It usually crashes when I get abour 100,000,000 elements :S Secondly, some of the questions require the addition of massive numbers. I use ulong data type where I think the number is going to get super

I'm working on the Project Euler problems (currently question 13 ). For this question I have to find the first 10 digits of the sum of 100 numbers all of a size similar to this: 91,942,213,363,574,161,572,522,430,563,301,811,072,406,154,908,250 I think I could use something like Java's BigInteger, but I started solving the problems in JavaScript (I'm trying to boost my js abilities for work), and I would like to continue using it, even to solve this problem. I'd like to stick to pure JS if possible. You are going to need a javascript based BigInteger library. There are many to choose from.

Possible Duplicate: What does BigInteger having no limit mean? The Javadoc for BigInteger does not define any maximum or minimum. However, it does say: (emphasis added) Immutable arbitrary-precision integers Is there such a maximum, even in theory? Or is the way BigInteger operates fundamentally different, such that there is in reality no maximum except for the amount of memory available on the computer? assylias The number is held in an int[] - the maximum size of an array is Integer.MAX_VALUE . So the maximum BigInteger probably is (2 ^ 32) ^ Integer.MAX_VALUE . Admittedly, this is