What is PROD(prime p; ((p-1)/p)^(1/p))? Is it 0 or positive? It might be interpreted as the expected value of phi(n)/n for very large n. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.seqfan.eu/pipermail/seqfan/attachments/20061204/eeebfeb2/attachment-0001.htm>