Primecoin? That coin hasn't seen a new release in three years:
https://github.com/primecoin/primecoin

Ranked 74th according to Coingecko developer score:
https://www.coingecko.com/en?page=2&sort_by=developer_score

It's an interesting coin, but apparently little more than a curiosity nowadays.

Also, why would you like to have a coin mined with SHA-256, and 'supported' by cancer-curing research? Is it not better to have a coin mined by cancer-curing research itself, and ditch the SHA-256 altogether? The last thing we need is more SHA-256 coins.