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Added Prime Factors for a Natural Number Program as per #54 #64

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akshitagupta15june merged 1 commit into from
Oct 9, 2020
Merged

Added Prime Factors for a Natural Number Program as per #54 #64

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39 changes: 39 additions & 0 deletions Maths/PrimeFactors.js
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//Prime Factorise a Natural Number into its Prime Factors (Issue #54)
//https://github.com/akshitagit/JavaScript/issues/54
//Contributed by @tauseefmohammed2 : https://github.com/tauseefmohammed2

function PrimeFactors (number) {

//Storing All Prime Factors in the Array : primeFactors
var primeFactors = [];

//Checking Whether 2 is a Factor of Input Number
while (number % 2 === 0) {
primeFactors.push(2);
number = number / 2;
}

//Storing Square Root in Variable : sqrtNumber
var sqrtNumber = Math.sqrt(number);

//Finding all Factors Between 3 and sqrtNumber
for (var i = 3; i <= sqrtNumber; i++) {
while (number % i === 0) {
primeFactors.push(i);
number = number / i;
}
}

//If the Input Number is Still Greater than 2, Then Push the Number itself in the Prime Factors Array
if (number > 2) {
primeFactors.push(number);
}

//Returning the Array of Prime Factors
return primeFactors;
}

console.log(PrimeFactors(50)); //Output : [2,5,5]
console.log(PrimeFactors(17)); //Output : [17]
console.log(PrimeFactors(100)); //Output : [2,2,5,5]
console.log(PrimeFactors(104)); //Output : [2,2,2,13]