biginteger

问题 Which will normally result in 1.157920892373162e+77 ,but what I want is the accurate number of 2 ** 256 like 1157920892731685487456125..... I has try big-integer and math.js but both can't show all of the number after calculate. 回答1: Works fine using big-integer : const bigInt = require('big-integer'); let value = bigInt(2).pow(256); console.log(value.toString()); // 115792089237316195423570985008687907853269984665640564039457584007913129639936 来源： https://stackoverflow.com/questions/45502194

问题 I am making a program for nth Fibonacci number. I made the following program using recursion and memoization. The main problem is that the value of n can go up to 10000 which means that the Fibonacci number of 10000 would be more than 2000 digit long. With a little bit of googling, I found that i could use arrays and store every digit of the solution in an element of the array but I am still not able to figure out how to implement this approach with my program. #include<iostream> using

问题 I have an entity with a field of type java.math.BigInteger public class MyEntity { private String id; private BigInteger max; } I don't have any problem in storing the entity in DB using Spring Data JPA; but when I retrieve the entity, I am getting the following exception org.springframework.data.mapping.model.MappingInstantiationException: Failed to instantiate java.math.BigInteger using constructor NO_CONSTRUCTOR with arguments BigInteger doesn't have a no-argument constructor. Is that a

问题 using System.Numerics; double doubleNumber = Math.Pow(1000, 99); // = 1.0E+297 BigInteger bigBase = (BigInteger)bigNumber; // = 1000000000000000017652801462756379714374878780719864776839443139119744823869255243069012222883470359078822072829219411228534934402712624705615450492327979456500795456339201761949451160807447294527656222743617592048849967890105831362861792425329827928397252374398383022243308510390698430058459037696 Why is the BigInteger value not just 1 kagillion (1,000 followed by a

问题 How to find 3 the biggest BigInteger objects in array? This is my code for now. package masivi; import java.math.BigInteger; import java.util.Scanner; public class largest3Numbers { public static void main(String[] args) { Scanner scan = new Scanner(System.in); int n = scan.nextInt(); BigInteger[] numbers = new BigInteger[n]; BigInteger tempbiggest1 = new BigInteger("0"); BigInteger biggest1 = new BigInteger("0"); BigInteger tempbiggest2 = new BigInteger("0"); BigInteger biggest2 = new

问题 How to from a JavaScript String, assuming that it will be converted to base 2 number representation, get length of it? var a = "27253612834651292817068063108051952822914696443427141008555142123316682144932254071632833688593262045689493008241655341783955326980297437493219806268065150183246111733458990008880411449482143090406377611761078341580375284217607011541826787677233082585754389591236816422975207551625801435043443350389601614965"; npm packages jsbn dont have it and big-integer returns in

问题 I'm searching for a BigInteger library that is compatible with the usual suspects of the Message Passing Interface standard, such as MPI::COMM_WORLD.Send and MPI::COMM_WORLD.Recv . Unfortunately MPI also stands for multi precision integer , so most search results actually do not match. Several attempts to search this with google using similar queries did not reveal any implementation, but surely someone already did that. So basically the question is: does anyone know an implementation of mpi

问题 I am trying to rapidly calculate large Fibonacci numbers. Here is my code. It is prohibitively slow for numbers above 1 million, how can it be improved? public static BigInteger fib(BigInteger n) { int k = n.intValue(); BigInteger ans = null; if(k == 0) { ans = new BigInteger("0"); } else if(Math.abs(k) <= 2) { ans = new BigInteger("1"); } else { BigInteger km1 = new BigInteger("1"); BigInteger km2 = new BigInteger("1"); for(int i = 3; i <= Math.abs(k); ++i) { ans = km1.add(km2); km2 = km1;

问题 ** This is a corrected post ** I'm doing some very intricate math calculations using BigDecimal and ran into an error in ONE of several thousand tests. Does anyone see something stupid that I did wrong? I don't think so. The output below (corrected from original post) is one of several traces from the calculations. It seems as if Java simply is only printing the non-BigInteger variables incorrectly because the function works - using x,ix, y and iy. The question is: why would the value of x

问题 I am currently working on an assignment that involves calculating Fibonacci numbers up to F(300) using a linear time complexity algorithm. I know via a quick search that a Java long will overflow at around F(93), so I am trying to figure out how to store such a large number. However, our assignment states that we are not allowed to use language libraries such as BigInteger to store our numbers. We must write our own large integer data type or object. What exactly am I to do in this case? I