user41513: How many proof-of-work algorithm exists for crypto currencies ? We know PoW in Bitcoin and Etherium are different. Is there any other algorithm used for crypto currencies ?

user12983: Any Strong Сryptography Hash Function can be used as PoW
So, the number of algorithms can be infinite. Counting the number of currently used hash-functions has no sense.

41513: <p>How many proof-of-work algorithm exists for crypto currencies ? We know PoW in Bitcoin and Etherium are different. Is there any other algorithm used for crypto currencies ?</p>
 12983: <p>Any Strong Сryptography Hash Function can be used as PoW</p>

<p>So, the number of algorithms can be infinite. Counting the number of currently used hash-functions has no sense.</p>
