属于这两组的第一个数字:
三,7,9,13,21,25,31,33,37,49,67,69,73,79,87,93,115,127,129,133,151,171,193,205,211,223,241,259,261,273,283,285,289,307,319,321,327,331,339,357,361,367,385,391,409,415,421,433,451,463,475,477,487,517,529,535,541,577,583,601,613,631,651,699,727,769,781,787,805,823,841,855,883,885,925,961,979,981,997,1009,1029,1039,1041,1053,1057,1087,1095,1101,1107,1123,1147,1183,1189,1201,1219,1231,1233,1245,1249,1261,1281,1291,1329,1339,1387,1389,1395,1401,1417,1435,1441,1459,1473,1485,1491,1497,1543,1567,1585,1597,1639,1645,1693,1749,1765,1777,1797,1801,1809,1819,1831,1857,1869,1893,1921,1933,1941,1945,1987,2001,2053,2065,2113,2125,2133,2173,2187,2211,2217,2257,2283,2311,2317,2323,2335,2365,2395,2407,2419,2461,2545,2571,2607,2647,2653,2667,2697,2715,2763,2773,2787,2821,2845,2887,2899,2901,2905,3073,3091,3097,3109,3121,3133,3153,3163,3175,3187,3223,3229,3243,3289,3301,3313,3351,3355,3381,3403,3405,3411,3427,3433,3477,3481,3607,3613,3655,3661,3669,3685,3697,3747,3753,3781,3793,3847,3865,3889,3909,4033,4063,4105,4129,4161,4173,4179,4195,4201,4207,4237,4255,4285,4315,4321,4363,4377,4383,4389,4399,4413,4431,4443,4455,4461,4483,4485,4495,4509,4519,4551,4569,4609,4621,4629,4645,4663,4675,4695,4699,4717,4725,4741,4801,4813,4819,4837,4867,4881,4887,4893,4929,4963,4965,4969,4977,4993,4999,5029,5041,5089,5127. 一些较大的示例:
9999511,9999517,9999541,9999643,9999645,9999655,9999699,9999711,9999721,9999739,9999741,9999763,9999811,9999813,9999823,9999825,9999835,9999957,9999961,9999997.