属于这两组的第一个数字：
三,5,15,17,23,29,33,43,51,53,65,71,77,83,85,89,95,101,113,119,123,139,141,149,159,163,177,187,197,209,215,221,235,249,255,257,263,267,269,277,281,287,293,303,311,317,323,329,335,337,347,349,353,359,365,371,373,377,383,389,393,401,407,411,413,427,435,437,447,449,455,461,467,469,473,479,485,503,509,519,523,533,537,547,553,559,561,571,573,581,591,593,599,619,629,643,649,667,673,679,683,685,691,697,703,705,717,739,745,751,753,763,771,773,785,795,797,807,811,821,839,843,851,853,857,863,869,879,881,887,893,907,917,933,937,943,951,957,965,977,983,989,1003,1013,1031,1037,1043,1049,1059,1061,1073,1079,1091,1093,1097,1103,1105,1111,1115,1117,1121,1133,1139,1141,1145,1151,1157,1167,1169,1181,1195,1203,1217,1223,1229,1235,1237,1241,1247,1253,1257,1271,1277,1283,1285,1289,1295,1297,1303,1307,1309,1313,1319,1333,1337,1343,1345,1351,1357,1363,1381,1385,1391,1393,1399,1403,1409,1415,1427,1429,1433,1439,1457,1463,1469,1481,1487,1489,1495,1499,1501,1511,1517,1523,1529,1535,1541,1551,1553,1559,1563,1565,1579,1589,1601,1607,1613,1619,1621,1631,1637,1649,1661,1671,1685,1689,1695,1699,1723,1733,1745,1757,1761,1779,1781,1793,1799,1811,1817,1823,1829,1841,1847,1851,1853,1861,1865,1871,1873,1879,1883,1885,1889,1895,1901,1907,1909,1913,1919,1923. 一些较大的示例：
9999821,9999827,9999833,9999839,9999845,9999863,9999867,9999869,9999883,9999893,9999907,9999919,9999931,9999933,9999941,9999953,9999959,9999965,9999979,9999989.