属于这两组的第一个数字:
三,7,13,19,31,47,61,73,103,109,131,151,167,181,193,199,229,233,241,271,283,313,409,421,433,443,463,491,577,601,647,661,677,709,743,761,823,829,859,883,911,919,941,953,971,997,1033,1039,1051,1063,1069,1109,1129,1153,1171,1193,1201,1231,1259,1291,1321,1327,1373,1453,1459,1483,1493,1571,1583,1609,1627,1669,1709,1831,1933,2017,2099,2113,2131,2143,2161,2207,2213,2243,2269,2273,2297,2311,2341,2351,2383,2441,2447,2477,2621,2633,2663,2693,2731,2753,2777,2843,2861,2887,2917,2957,3041,3083,3121,3169,3209,3229,3253,3271,3301,3331,3361,3373,3413,3463,3469,3529,3583,3593,3617,3623,3673,3779,3853,3881,3889,3967,4079,4093,4099,4111,4129,4139,4159,4219,4231,4243,4261,4273,4297,4339,4363,4373,4483,4519,4523,4639,4643,4663,4723,4759,4789,4793,4801,4909,4969,5003,5011,5059,5119,5179,5237,5281,5333,5399,5419,5573,5641,5659,5717,5827,6079,6151,6199,6203,6277,6287,6301,6329,6343,6361,6427,6451,6529,6553,6661,6679,6709,6803,6833,6911,6949,6961,7043,7159,7213,7219,7253,7309,7333,7369,7459,7561,7691,8059,8123,8171,8179,8191,8221,8237,8243,8293,8297,8317,8369,8389,8423,8467,8527,8539,8581,8599,8609,8629,8647,8681,8741,8753,8783,8807,8821,8849,8933,9013,9043,9049,9109,9137,9161,9227,9241,9257,9283,9323,9349,9377,9421,9433,9649,9697,9743,9817,9833,10009,10111,10223,10247,10259,10321,10333,10337,10343,10433,10501,10513,10567,10601,10631,10691,10837,10891,11261,11279,11287. 一些较大的示例:
9998459,9998543,9998701,9998719,9998743,9998809,9998903,9999053,9999167,9999299,9999347,9999469,9999481,9999533,9999601,9999659,9999667,9999943,9999973,9999991.