Class v6 invention: the drawn-era F8-form read of the sound per-load form (not clean: 7 of 64 seeds with a site under the 0.995 floor, min 0.940, one item at 1,938 reads; the per-load class runs no (c'''), so the floor joins G5-draw with the seven seeds as the known-failed case; the uniform-control share column labelled as not F8's number), the harness's era option

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/analysis/class-v6/logs/uniform-era-mx8_shl4096x1.tsv

@@ -0,0 +1,65 @@
+class	seed	attempt	program_id	min_site_ratio	min_site	top0.1_share	control_share	ratio_to_control	max_item_reads	max_item	control_max	reads
+mx8+shl4096x1	4	0	8b26974db22f7adb	1.00013	6	0.002493	0.002377	1.0489	28	0	29	134217728
+mx8+shl4096x1	2	0	3764a916ec848654	0.98948	4	0.002514	0.002380	1.0564	29	0	29	134217728
+mx8+shl4096x1	3	0	8760a65b01a4eec3	1.00012	6	0.002712	0.002380	1.1392	31	0	28	134217728
+mx8+shl4096x1	7	2	0bf5a36c962d1298	1.00012	15	0.002754	0.002379	1.1579	31	0	27	134217728
+mx8+shl4096x1	6	3	407564abd1ecf8fb	1.00009	12	0.002930	0.002380	1.2311	33	0	28	134217728
+mx8+shl4096x1	1	8	c5ea07d99fabfede	1.00013	7	0.002863	0.002381	1.2024	32	0	27	134217728
+mx8+shl4096x1	5	8	25cec98741f2d310	1.00006	14	0.002593	0.002379	1.0899	29	0	28	134217728
+mx8+shl4096x1	0	21	c1b0bf25a44c43a5	1.00014	9	0.002755	0.002382	1.1562	30	0	27	134217728
+mx8+shl4096x1	8	1	badfcc7b19f88069	1.00012	5	0.002499	0.002379	1.0504	30	0	27	134217728
+mx8+shl4096x1	11	1	b71c56b0cac71afe	1.00012	11	0.003118	0.002382	1.3092	34	0	27	134217728
+mx8+shl4096x1	10	5	ea04e485b78bb7d7	0.99892	15	0.003545	0.002381	1.4886	38	0	27	134217728
+mx8+shl4096x1	12	8	1604cd82d168e803	1.00013	12	0.002596	0.002381	1.0900	30	0	27	134217728
+mx8+shl4096x1	14	3	3ec256c4201b2dc5	0.99948	0	0.002945	0.002382	1.2364	33	0	27	134217728
+mx8+shl4096x1	13	6	1b7583111f414673	0.99928	8	0.002865	0.002383	1.2025	31	0	27	134217728
+mx8+shl4096x1	9	0	dfc9d1d5817b06e1	0.99877	1	0.002489	0.002380	1.0458	28	0	28	134217728
+mx8+shl4096x1	15	14	6eb7067aed8aa8d2	1.00010	8	0.002383	0.002380	1.0011	29	0	27	134217728
+mx8+shl4096x1	17	3	aa67aa41a40c765a	1.00008	10	0.002851	0.002380	1.1983	34	0	27	134217728
+mx8+shl4096x1	18	0	d05ff66c095ed53c	0.99449	2	0.002707	0.002381	1.1369	31	0	27	134217728
+mx8+shl4096x1	19	1	5b8a713ce263bc37	1.00013	11	0.003129	0.002381	1.3141	35	0	27	134217728
+mx8+shl4096x1	22	6	32c7c11e24f33a82	1.00010	15	0.002599	0.002382	1.0911	28	0	27	134217728
+mx8+shl4096x1	16	14	cdc7f03fd8219abe	1.00013	13	0.002673	0.002381	1.1226	30	0	27	134217728
+mx8+shl4096x1	20	7	f61563c3ada11f92	0.99447	0	0.002509	0.002378	1.0549	29	0	27	134217728
+mx8+shl4096x1	23	1	0d9ab5e5702fde85	0.99943	11	0.002514	0.002378	1.0569	29	0	28	134217728
+mx8+shl4096x1	21	19	82bdbb697373a55f	1.00013	8	0.002611	0.002382	1.0959	31	0	28	134217728
+mx8+shl4096x1	25	3	33a74cae3a54731e	0.99711	5	0.002762	0.002381	1.1602	32	0	26	134217728
+mx8+shl4096x1	24	2	0e31b5c579eb7b1f	1.00009	4	0.002454	0.002380	1.0311	28	0	28	134217728
+mx8+shl4096x1	26	8	8aabdea5da1f5b24	0.97847	14	0.003071	0.002380	1.2904	542	0	26	134217728
+mx8+shl4096x1	28	2	c888297c45360309	0.99562	4	0.002733	0.002380	1.1483	31	0	28	134217728
+mx8+shl4096x1	27	1	ae243b93dc021c19	0.95594	10	0.002622	0.002381	1.1011	1938	0	26	134217728
+mx8+shl4096x1	31	0	651940b69196cd6b	1.00017	14	0.002944	0.002382	1.2361	33	0	28	134217728
+mx8+shl4096x1	29	2	32e42bd966e953a2	1.00009	0	0.003115	0.002379	1.3092	35	0	27	134217728
+mx8+shl4096x1	30	1	c925e0019bb99b3c	1.00010	1	0.002883	0.002381	1.2108	35	0	27	134217728
+mx8+shl4096x1	32	0	b4ee4da03147256f	1.00009	7	0.002862	0.002379	1.2028	33	0	28	134217728
+mx8+shl4096x1	34	1	becdff9e1b454a3c	0.99452	8	0.002497	0.002381	1.0487	28	0	27	134217728
+mx8+shl4096x1	36	7	67e99c1c77fadd85	1.00010	1	0.002860	0.002380	1.2016	32	0	28	134217728
+mx8+shl4096x1	35	3	7def70357c164f66	1.00008	7	0.002753	0.002381	1.1564	32	0	28	134217728
+mx8+shl4096x1	37	1	6e89e5149a77ac35	0.99987	9	0.002703	0.002380	1.1356	32	0	27	134217728
+mx8+shl4096x1	38	0	4e94a6b9f384ada9	1.00013	5	0.002864	0.002380	1.2030	32	0	27	134217728
+mx8+shl4096x1	33	9	e79c351e73c42fa6	1.00010	5	0.003117	0.002381	1.3094	36	0	28	134217728
+mx8+shl4096x1	39	0	c7594ad92bc0fffa	0.99946	0	0.002413	0.002382	1.0132	28	0	27	134217728
+mx8+shl4096x1	43	0	80b52717c66fed64	1.00013	7	0.002595	0.002381	1.0898	29	0	27	134217728
+mx8+shl4096x1	41	1	8165d35c308b82f7	1.00013	2	0.003193	0.002383	1.3399	37	0	27	134217728
+mx8+shl4096x1	40	16	89bd764c12b883e7	1.00016	7	0.002514	0.002381	1.0558	29	0	27	134217728
+mx8+shl4096x1	46	1	3619ccc0ca59e780	1.00009	10	0.002753	0.002381	1.1565	34	0	28	134217728
+mx8+shl4096x1	44	4	0eda24762c7f7ddf	0.99983	0	0.003121	0.002381	1.3109	36	0	27	134217728
+mx8+shl4096x1	45	2	9f4e0b6895695441	0.99928	9	0.002677	0.002382	1.1236	31	0	26	134217728
+mx8+shl4096x1	42	20	6dd422548d7374b7	1.00010	4	0.002791	0.002381	1.1724	33	0	26	134217728
+mx8+shl4096x1	47	3	e5b9bcfb8fc594a1	1.00008	12	0.002714	0.002378	1.1412	30	0	28	134217728
+mx8+shl4096x1	48	4	ae73b91c8cb0eb65	1.00011	15	0.002603	0.002381	1.0931	30	0	28	134217728
+mx8+shl4096x1	51	7	54eedec66fd25844	0.99999	13	0.003019	0.002378	1.2694	34	0	27	134217728
+mx8+shl4096x1	54	2	5dfbe68ec52215f6	1.00013	10	0.003379	0.002380	1.4197	38	0	26	134217728
+mx8+shl4096x1	50	6	3f568f23f1d5726f	0.93998	9	0.002711	0.002379	1.1395	66	0	27	134217728
+mx8+shl4096x1	53	2	e29d6c9e80086a64	1.00015	1	0.003285	0.002380	1.3800	36	0	27	134217728
+mx8+shl4096x1	49	9	7f698114a589e47a	1.00012	15	0.002593	0.002381	1.0895	30	0	27	134217728
+mx8+shl4096x1	52	12	38be51c6ea080fdd	1.00014	6	0.002514	0.002379	1.0566	28	0	28	134217728
+mx8+shl4096x1	55	2	8e59845a615ccda4	1.00013	14	0.002589	0.002380	1.0878	28	0	27	134217728
+mx8+shl4096x1	56	10	4a9cf666fd0e201b	1.00007	12	0.002667	0.002381	1.1202	30	0	28	134217728
+mx8+shl4096x1	57	2	fc4851c828a7453a	1.00012	8	0.002849	0.002382	1.1960	32	0	27	134217728
+mx8+shl4096x1	62	0	1c1c19b6b075c89f	1.00014	4	0.002593	0.002380	1.0894	30	0	27	134217728
+mx8+shl4096x1	58	2	9eaad3e9dbac56eb	1.00012	12	0.002928	0.002380	1.2301	32	0	26	134217728
+mx8+shl4096x1	61	2	47f5d446f055699e	1.00015	7	0.003035	0.002383	1.2736	36	0	29	134217728
+mx8+shl4096x1	60	15	1a38df895c6de9be	1.00016	13	0.002613	0.002380	1.0979	29	0	26	134217728
+mx8+shl4096x1	59	1	d662101d18a15ee9	1.00011	13	0.002668	0.002381	1.1203	31	0	27	134217728
+mx8+shl4096x1	63	2	42652ca40c92d654	0.99958	11	0.003121	0.002381	1.3108	35	0	26	134217728

tools/attack/v6-invention/uniform/src/main.rs

@@ -35,12 +35,19 @@ fn main() {
     let log2: u32 = arg(&args, "--log2", "28").parse().unwrap();
     let day = arg(&args, "--day", "2026-10-03");
     let prefix = arg(&args, "--prefix", "igneum-v6inv");
-    let class = LoadClass::parse(&class_name).expect("class");
+    // --era N: the class composed over the era seed igneum-era-test/<N> (the census's drawn eras); "seed" draws
+    // era <seed mod 16> per seed as the acceptance census does
+    let era_arg = arg(&args, "--era", "none");
+    let base_class = LoadClass::parse(&class_name).expect("class");
+    let era_of = |n: u32| -> LoadClass {
+        let w = seed_words_from_bytes(format!("igneum-era-test/{n}").as_bytes());
+        let mut b = Vec::new();
+        for x in w { b.extend_from_slice(&x.to_le_bytes()); }
+        LoadClass::era(base_class, &b, &igneum_pow::generator::V3_ALLOWED)
+    };
     let ds = DatasetSource::new(&day, DatasetMode::ClosedForm, log2);
     let items = 1usize << (log2 - 4);
-    let w = (1u64 << log2) as f64;
     let n = (nonces as f64) * (igneum_pow::generator::ITERATIONS as f64); // evaluations per site
-    let e_s = n - n * n / (2.0 * w);
     let next = AtomicUsize::new(0);
     let out = Mutex::new(std::io::stdout());
     println!("class\tseed\tattempt\tprogram_id\tmin_site_ratio\tmin_site\ttop0.1_share\tcontrol_share\tratio_to_control\tmax_item_reads\tmax_item\tcontrol_max\treads");
@@ -52,6 +59,7 @@ fn main() {
                     break;
                 }
                 let label = format!("{prefix}/{i}");
+                let class = match era_arg.as_str() { "none" => base_class, "seed" => era_of(i % 16), n => era_of(n.parse().unwrap()) };
                 let tries = attempts_class(&label, label.as_bytes(), class);
                 let Some((p, _)) = tries.into_iter().find(|(_, r)| r.is_ok()) else {
                     let mut o = out.lock().unwrap();
@@ -76,7 +84,14 @@ fn main() {
                     }
                     base += 32;
                 }
-                let (min_ratio, min_site) = distinct.iter().enumerate().map(|(s, d)| (d.len() as f64 / e_s, s)).fold((f64::MAX, 0usize), |a, b| if b.0 < a.0 { b } else { a });
+                let mask = (1u32 << log2) - 1;
+                let loads: Vec<&igneum_pow::generator::Instr> = p.instrs.iter().filter(|x| x.op.is_load()).collect();
+                let (min_ratio, min_site) = distinct.iter().enumerate().map(|(s, d)| {
+                    let wm = if p.class.era.is_some() { igneum_pow::verify::window(loads[s], mask, log2).0 } else { mask };
+                    let w_s = (wm as f64) + 1.0;
+                    let e = n - n * n / (2.0 * w_s);
+                    (d.len() as f64 / e, s)
+                }).fold((f64::MAX, 0usize), |a, b| if b.0 < a.0 { b } else { a });
                 let (share, max_reads) = top_share(&mut counts, 0.001);
                 let max_item = 0u32; // the heaviest item's index is not kept (the sort loses it); the count is the number
                 // the uniform control: the same number of reads over the same items