[igraph] Search for k-cliques

[Lacón Grelos]

        Hi i-graphers
	I am trying to recover all triangles (3-cliques) in my graph (200000  
nodes and 1.2 Million links) with the igraph function "cliques".  
Unfortunately computation time is huge (>1day !). I was wondering  
wether this is normal and if there is any other faster way to get the  
k-cliques in my graph (with k small).
        Thanks in advance.
        Best