属于这两组的第一个数字：
7,13,15,21,31,37,63,69,79,87,93,111,127,133,135,141,151,159,189,205,219,223,231,237,261,285,303,319,327,349,357,367,391,399,415,421,429,463,477,487,495,511,517,519,535,541,559,583,591,613,615,621,631,639,645,651,655,679,685,693,717,723,727,735,741,777,781,805,823,831,855,885,895,903,925,927,933,957,975,981,991,997,1021,1023,1029,1039,1053,1057,1087,1093,1095,1101,1105,1117,1155,1167,1183,1189,1197,1201,1231,1233,1245,1249,1261,1263,1285,1303,1309,1339,1357,1365,1387,1389,1419,1455,1471,1485,1495,1501,1503,1519,1533,1543,1567,1575,1597,1599,1639,1645,1659,1663,1693,1701,1705,1711,1731,1749,1765,1767,1773,1797,1831,1839,1869,1879,1893,1933,1941,1959,1965,1983,1995,2023,2031,2053,2059,2079,2085,2095,2113,2125,2127,2133,2173,2215,2221,2239,2253,2257,2271,2277,2301,2311,2317,2335,2343,2365,2379,2407,2415,2439,2445,2461,2479,2493,2511,2527,2557,2575,2589,2599,2607,2647,2653,2661,2671,2725,2773,2781,2797,2815,2817,2821,2823,2845,2877,2887,2901,2943,2953,2973,2983,3003,3007,3031,3037,3039,3055,3099,3109,3111,3133,3171,3175,3183,3199,3213,3223,3229,3261,3289,3301,3325,3339,3351,3355,3381,3405,3409,3433,3439,3453,3477,3487,3495,3559,3565,3595,3597,3603,3607,3613,3621,3625,3655,3661,3663,3669,3685,3687,3709,3717,3727,3781,3789,3847,3865,3879,3909,3943,3951,3975,3981,3991,3999,4015,4023,4033,4045. 一些较大的示例：
9999439,9999477,9999487,9999495,9999511,9999517,9999519,9999541,9999591,9999645,9999655,9999685,9999711,9999741,9999807,9999813,9999823,9999855,9999957,9999997.