> For the complete documentation index, see [llms.txt](https://tokens-economy.gitbook.io/consensus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tokens-economy.gitbook.io/consensus/chain-based-others/scrypt-adaptive-n-asic-resistant.md).

# Scrypt-adaptive-N (ASIC resistant)

The idea behind the algorithm is that even if the memory requirements of the Scrypt algorithm used by Litecoin were adjusted, there would always come a time when it would not be high enough to render ASIC development impossible. Since this issue must be dealt with from the start, Scrypt-N is a perfect solution. Scrypt-N relies on the “Adaptive N-Factor” in which N is the memory required to complete new hashing functions.

The idea is that N (memory requirement) will always increase over time, rendering ASIC development unfeasible. A coin with an adaptive 'n' factor usually starts at '11' , and stating it is adaptive that means that over time usually specific to a future unix time stamp it will become '12' , '13'... As it increases the amount of memory necessary to 'mine' the coin increases....quickly.

## Used in

* [Vertcoin](https://vertcoin.org)
* ExeCoin (EXE)
* GPUcoin (GPUC)
* ParallaxCoin (PLX)
* SiliconValleyCoin (XSV)