seen this posted the other day.. Looks like Bitmain purchased BTC.com from ole homero lol..  Anyway  it looks like f2pool got a huge push in hash last few days.. https://chain.btc.com/en/stats/pool?pool_mode=day3  

Lost of nice stats and graphs on this site.


edit:  chain.so shows us at 511.43 PH/s.. could just be another spike of variance like it was a week back or so.
Best Regards
d57heinz