Search a number
unprimeable n.  and  wasteful n.

First numbers that belong to both sets:

200, 204, 206, 208, 322, 324, 325, 326, 328, 510, 514, 515, 516, 518, 530, 532, 534, 535, 536, 538, 620, 622, 624, 626, 628, 840, 842, 844, 845, 846, 848, 890, 892, 894, 895, 898, 1070, 1074, 1076, 1078, 1130, 1132, 1140, 1144, 1146, 1148, 1260, 1265, 1266, 1268, 1330, 1332, 1334, 1336, 1338, 1340, 1342, 1348, 1350, 1352, 1356, 1410, 1412, 1414, 1416, 1460, 1462, 1464, 1468, 1500, 1506, 1508, 1640, 1644, 1648, 1670, 1672, 1674, 1676, 1680, 1684, 1686, 1688, 1710, 1712, 1716, 1760, 1764, 1768, 1790, 1794, 1796, 1798, 1850, 1852, 1854, 1890, 1892, 1896, 1898, 1924, 1925, 1926, 1928, 1960, 1962, 1964, 1965, 1968, 2040, 2042, 2044, 2046, 2070, 2072, 2074, 2076, 2078, 2100, 2102, 2104, 2106, 2108, 2180, 2182, 2184, 2185, 2186, 2188, 2190, 2192, 2194, 2196, 2198, 2320, 2322, 2324, 2325, 2326, 2328, 2360, 2362, 2364, 2365, 2366, 2400, 2402, 2404, 2405, 2406, 2408, 2480, 2482, 2484, 2486, 2488, 2490, 2492, 2494, 2496, 2498, 2510, 2512, 2514, 2516, 2518, 2562, 2564, 2565, 2566, 2568, 2580, 2582, 2584, 2585, 2586, 2588, 2820, 2822, 2824, 2825, 2826, 2828, 2940, 2942, 2945, 2946, 2948, 2980, 2982, 2984, 2985, 2986, 2988, 3050, 3052, 3054, 3055, 3056, 3058, 3090, 3092, 3094, 3096, 3098, 3140, 3142, 3144, 3145, 3146, 3148, 3150, 3152, 3154, 3156, 3158, 3170, 3172, 3174, 3175, 3176, 3178, 3230, 3232, 3234, 3236, 3238, 3240, 3242, 3244, 3245, 3246, 3248, 3260, 3262, 3264, 3266, 3268, 3280, 3282, 3284, 3285, 3286, 3288, 3420, 3422, 3424, 3425, 3426, 3428, 3470, 3472, 3474, 3475, 3476, 3478, 3480, 3482, 3484, 3485, 3486, 3488, 3500, 3502, 3504, 3506, 3508, 3560, 3562, 3564, 3565, 3566, 3568, 3660, 3662, 3664, 3666, 3668, 3680, 3682.

Some larger examples :