属于这两组的第一个数字:
21,69,87,93,213,309,321,327,339,381,453,471,501,597,681,687,699,789,849,939,1041,1047,1077,1101,1119,1137,1149,1293,1299,1317,1329,1347,1371,1383,1389,1401,1437,1461,1473,1497,1509,1527,1623,1707,1797,1821,1857,1893,1941,2217,2283,2391,2517,2571,2721,2733,2787,2811,2859,2901,2991,3003,3093,3153,3189,3351,3453,3543,3669,3747,3909,3921,3957,4101,4119,4197,4317,4341,4353,4359,4377,4413,4443,4449,4461,4467,4479,4497,4533,4569,4593,4629,4677,4701,4821,4881,4989,5079,5127,5169,5187,5199,5223,5241,5277,5331,5349,5361,5367,5403,5433,5541,5583,5601,5613,5619,5631,5637,5703,5721,5847,5853,5919,5937,5961,5979,5991,5997,6009,6033,6081,6087,6117,6261,6423,6429,6483,6609,6621,6819,6843,6891,6933,6999,7197,7233,7251,7269,7377,7431,7617,7629,7647,7653,7671,7773,7851,7941,7989,8013,8031,8049,8061,8133,8157,8331,8367,8529,8661,8751,8859,8871,8889,8907,9003,9123,9147,9237,9489,9501,9543,9561,9573,9687,9771,9813,9897,9903,10077,10299,10347,10371,10383,10401,10407,10473,10581,10671,10779,10815,10851,10893,10911,10929,10977,11019,11181,11199,11307,11499,11541,11589,11733,11787,11967,12003,12009,12171,12219,12381,12459,12633,12657,12693,12759,13173,13227,13269,13341,13389,13521,13557,13569,13641,13647,13683,13701,13749,13773,13791,13809,13911,13917,14037,14109,14163,14169,14199,14277,14379,14613,14709,14763,14907,14979,15009,15027,15033,15243,15339,15441,15681,15693,15699,15711,15837,16041,16197,16221,16413,16437,16449,16503,16509,16581,16593,16671,16689,16695,16707. 一些较大的示例:
7040739,7040931,7041003,7041093,7041711,7041813,7042137,7042263,7042317,7042323,7042341,7042353,7042359,7042461,7042533,7042647,7042677,7042731,7042773,7042881.