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# biginteger – How to work with big numbers in PHP?

Posted by: admin July 12, 2020 Leave a comment

Questions:

How to work with big numbers in PHP?

such as

``````(6*27^0+17*27^1+11*27^2+18*27^3+25*27^4+4*27^5)^65537
``````
How to&Answers:

You can go for BCMath to work with big numbers.

### Answer：

GMP’s actually faster than BCMath for bigintegers if you have it installed. If you have neither BCMath or GMP installed you can use phpseclib’s pure-php biginteger implementation.

That implementation uses GMP or BCmath if they’re available, in that order, and it’s own internal implementation otherwise.

### Answer：

There are many options:

### Answer：

Given the question title, I’m assuming that the OP meant `^` as a power operator and not PHP’s XOR operator, although the actual numbers make me doubt.

This can be achieved using the Brick\Math library (disclaimer: I authored it):

``````use Brick\Math\BigInteger;

// Not using BigInteger just yet as the numbers are small, although we could
\$value =  6 * 27 ** 0
+ 17 * 27 ** 1
+ 11 * 27 ** 2
+ 18 * 27 ** 3
+ 25 * 27 ** 4
+  4 * 27 ** 5;

echo BigInteger::of(\$value)->power(65537); // 529970661615774734826076722083948398443...
``````

I’m sparing you the rest of the 514566 digits 🙂