Unprimeables

The unprimeables are a small selection of numbers who cannot be made prime by changing just one of their digits.

The numbers
200, 204, 206, 208, 320, 322, 324, 325, 326, 328, 510, 512, 514, 515, 516, 518, 530, 532, 534, 535, 536, 538, 620, 622, 624, 625, 626, 628, 840, 842, 844, 845, 846, 848, 890, 892, 894, 895, 896, 898, 1070, 1072, 1074, 1075, 1076, 1078, 1130, 1132, 1134, 1135, 1136, 1138, 1140, 1142, 1144, 1145, 1146, 1148, 1260, 1262, 1264, 1265, 1266, 1268, 1330, 1332, 1334, 1335, 1336, 1338, 1340, 1342, 1344, 1345, 1346, 1348, 1350, 1352, 1354, 1355, 1356, 1358, 1410, 1412, 1414, 1415, 1416, 1418, 1460, 1462, 1464, 1465, 1466, 1468, 1500, 1502, 1504, 1505, 1506, 1508, 1640, 1642, 1644, 1645, 1646, 1648, 1670, 1672, 1674, 1675, 1676, 1678, 1680, 1682, 1684, 1685, 1686, 1688, 1710, 1712, 1714, 1715, 1716, 1718, 1760, 1762, 1764, 1765, 1766, 1768, 1790, 1792, 1794, 1795, 1796, 1798, 1850, 1852, 1854, 1855