research notes update 2026-08-19 04:01:24

1 files changed, 15 insertions, 0 deletions

diff --git a/prime-grokking/main.md b/prime-grokking/main.md
index 863543c..257b235 100644
--- a/prime-grokking/main.md
+++ b/prime-grokking/main.md
@@ -138,3 +138,18 @@ cross the gap from pattern matching to computation.
   used the old `[101,200]` probe, so E6's locked probe was run separately on
   CPU. E7 remains the planned 4M-step (20×) follow-up on the strongest E6
   cells, to distinguish a slow generalising basin from its absence.
+
+### 2026-08-18 — E6 complete
+
+- All 16 pre-registered CUDA/AMP cells are complete. No O1, P5(k), or P6
+  outcome occurred: seven low-weight-decay cells are O-PARTIAL, nine are O4,
+  and every cell is P4 on the locked `[1001,2000]` probe. The wd=1.0 three-seed
+  replication is O4 in both architectures.
+- Thus the 10× range extension improved in-range fitting but did not yield a
+  transferable sieve/divisibility signature; E6 supports an algorithmic rather
+  than data-bound wall. The batch-128 transformer was additionally unstable at
+  the end of training (train EM 1.00→0.55; val EM 0.83→0.45).
+- The E7 4M-step follow-up remains the discriminating test for a slow basin.
+  Before it, `src/eval.py` must implement the locked `[1001,2000]` probe and
+  P5/P6 ladder: its stored P fields still derive from the obsolete `[101,200]`
+  evaluation.