For certain ranges of numbers.

But you could imagine this being part of, say, a "big integer" library. (Which C, C++, PHP, JS all lack.)

You will hopefully have to edit out JS someday:

https://github.com/tc39/proposal-bigint

https://developers.google.com/web/updates/2018/05/bigint

If you like esoteric, I learned this algorithm for obtaining the exponent of a 2x2 matrix, which amusingly enough is part of an interesting fibonaccialgorithm.