Java Utililty Methods BigInteger Factorial

List of utility methods to do BigInteger Factorial

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Description

The list of methods to do BigInteger Factorial are organized into topic(s).

Method

BigIntegerfactorial(BigInteger n)
Naive (dumb) implementation of the factorial function. 
if (n.equals(BigInteger.ONE)) {
    return BigInteger.ONE;
return n.multiply(factorial(n.subtract(BigInteger.ONE)));
BigIntegerfactorial(BigInteger n)
Compute the Factorial of n, often written as c! in mathematics. 
BigInteger nFac = BigInteger.ONE;
while (n.compareTo(BigInteger.ONE) > 0) {
    nFac = nFac.multiply(n);
    n = n.subtract(BigInteger.ONE);
return nFac;
BigIntegerfactorial(BigInteger number)
factorial 
BigInteger result = BigInteger.valueOf(1);
for (long factor = 2; factor <= number.longValue(); factor++) {
    result = result.multiply(BigInteger.valueOf(factor));
return result;
BigIntegerfactorial(BigInteger originValue)
factorial 
BigInteger one = new BigInteger("1");
BigInteger result = new BigInteger("1");
while (originValue.compareTo(one) > 0) {
    result = result.multiply(originValue);
    originValue = originValue.subtract(one);
return result;