This may not be strictly riecoin and 6-tuplet stuff, but I still think this forum is the best place to post it:

rieMiner 0.9 (by pttn) set a world record yesterday, finding a 527-digit 7-tuplet in Benchmark mode.
http://anthony.d.forbes.googlepages.com/ktuplets.htm
The record attempt ran for about 1130 hours on a Ryzen 1700.

regards,

vidarn/Art3mis