diff --git a/anchor/README.md b/anchor/README.md
index 8acc5a2..953922e 100644
--- a/anchor/README.md
+++ b/anchor/README.md
@@ -305,7 +305,7 @@ than f+1 and less than the block's own quorum. Raising it to seven is a delibera
 liveness cost, and it has not been taken.
 
 Two things follow, and both should be said rather than left to be discovered. The word "quorum"
-applies **only at anchor heights** - about every 32nd block; the blocks between them carry no Falcon
+applies **only at anchor heights** - about every 128th block (every 32nd until block 17,225,968); the blocks between them carry no Falcon
 seals at all and are finalized by ECDSA alone, so "a post-quantum quorum on every block" would be
 false. And the higher threshold costs liveness margin: at K=6 of ten, four late validators are
 enough to stall an anchor block, where K=3 tolerated seven. That trade was made deliberately, and it