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Lehmer n.  and  unprimeable n.

First numbers that belong to both sets:

3145, 7735, 9265, 11305, 16405, 19345, 20995, 43165, 43435, 64345, 65365, 74665, 75055, 85765, 110245, 120445, 124015, 132595, 146965, 153595, 155365, 162955, 170905, 176035, 180115, 192865, 228565, 247105, 248005, 263245, 287695, 293845, 311695, 326005, 332815, 397195, 415735, 449065, 464185, 478465, 483295, 493885, 501145, 512635, 538135, 577435, 606985, 625795, 630565, 637585, 656635, 683365, 699805, 741445, 747385, 750295, 771715, 786505, 800605, 825265, 826255, 857935, 872515, 898705, 914005, 949165, 983055, 988165, 1011415, 1050985, 1077805, 1101245, 1149655, 1152295, 1197565, 1208605, 1260805, 1274065, 1291555, 1296505, 1343935, 1344295, 1349545, 1361785, 1364595, 1366135, 1374895, 1385245, 1433185, 1437115, 1472065, 1483615, 1487245, 1542835, 1566805, 1574455, 1578235, 1591285, 1607095, 1612195, 1620385, 1666645, 1727545, 1735615, 1736035, 1749805, 1756015, 1759915, 1768045, 1773535, 1782295, 1788145, 1799365, 1830985, 1862095, 1928785, 1939015, 1961155, 2044435, 2094655, 2170345, 2174305, 2178745, 2221765, 2288455, 2313955, 2356285, 2368255, 2423345, 2449105, 2463385, 2471365, 2521135, 2531845, 2654455, 2686765, 2714545, 2741845, 2747785, 2766835, 2811145, 2865265, 2939335, 3037165, 3130645, 3181465, 3223285, 3224065, 3275455, 3281965, 3332005, 3384445, 3470785, 3533245, 3570085, 3588445, 3597595, 3626185, 3660865, 3664585, 3687895, 3720445, 3730255, 3748345, 3770515, 3811705, 3961105, 4011745, 4027405, 4033695, 4048465, 4052035, 4066855, 4079065, 4091305, 4187695, 4248895, 4289455, 4297345, 4326595, 4336735, 4371445, 4380565, 4406605, 4428535, 4442245, 4448665, 4456465, 4461565, 4463095, 4463755, 4511035, 4527205, 4587415, 4595515, 4611865, 4710955, 4712095, 4734415, 4742365, 4757365, 4771645, 4826095, 4830805, 4859845, 4992905, 4997365, 5096455, 5163835, 5182405, 5190115, 5214835, 5437705, 5502595, 5505535, 5583055, 5632315, 5744935, 5948215, 5973745, 5978435, 5999215, 6038215, 6047485, 6054985, 6072655, 6169555, 6185845, 6236035, 6263545, 6269605, 6290935, 6323485, 6397405, 6461665, 6510505, 6522985, 6664255, 6747385, 6912115, 6940165, 6952765, 7005445, 7079905, 7154365, 7208155, 7233205, 7265035, 7330765, 7372135, 7397755, 7426015, 7565545, 7610905, 7641895, 7690495, 7720495, 7732705, 7824505, 7890805, 7921615, 7989235, 7994335, 8012845, 8122885, 8135335, 8171815, 8225365, 8293195, 8301895, 8305945, 8353885, 8536255, 8574385, 8762755, 8792485, 8883865, 8907235, 9006565, 9050245, 9053095, 9090835, 9096865, 9099085, 9132565, 9173965, 9176185, 9251245, 9500305, 9502865, 9582145, 9638785, 9674785, 9683535, 9784915, 9796165, 9946615.