+--------+------------+
| length | prime      |
+--------+------------+
|      6 |        139 |
|      7 |        617 |
|      8 |       1069 |
|      9 |       3389 |
|     10 |      11497 |
|     11 |      17863 |
|     12 |      58013 |
|     13 |     136859 |
|     14 |     239873 |
|     15 |     608789 |
|     16 |    1091339 |
|     17 |    2899861 |
|     18 |    5357603 |
|     19 |   13919273 |
|     20 |   27700919 |
|     21 |   70483537 |
|     22 |  122954173 |
|     23 |  282097363 |
|     24 |  477395357 |
|     25 | 1138900957 |
|     26 | 2125065391 |
|     27 | 2222066747 |
|     28 | 2223454153 |
|     29 | 2223540623 |
|     30 | 2223457723 |
|     31 | 2223455783 |
|     32 | 2223415277 |
|     33 | 2223455719 |
|     34 | 2222023187 |
|     35 | 2222997269 |
|     36 | 2222995267 |
|     37 | 2215116089 |
|     38 | 2216620451 |
|     39 | 2207839849 |
|     40 | 2214612893 |
|     41 | 2208116363 |
|     42 | 2209019167 |
|     43 | 2193161587 |
|     44 | 2208447523 |
|     45 | 2145335267 |
|     46 | 2214515689 |
|     47 | 2199578137 |
|     48 | 2202865057 |
|     49 | 2132006857 |
|     50 | 2032432307 |
|     51 | 1887404543 |
|     52 | 2062681967 |
|     53 | 1876375681 |
|     54 | 2069461679 |
|     55 | 1626092113 |
|     56 | 1119841529 |
|     57 | 1079709649 |
|     58 | 2209075969 |
|     59 |  634711921 |
|     60 | 2092367471 |
|     61 | 1054287809 |
|     62 | 2212584529 |
|     64 |  947815391 |
|     66 | 1052665507 |
|     68 | 1600387799 |
|     72 | 1113314879 |
|     74 | 2185862449 |
|     76 |   40754999 |
|     80 |  688333799 |
|     82 | 2205311761 |
|     84 |  131486759 |
|     86 | 2148698161 |
|     94 | 1942317001 |
|    106 | 1163729449 |
|    118 | 1865172409 |
|    122 | 1158696289 |
|    134 | 1154733889 |
|    142 | 1008273289 |
|    158 |  427733329 |
|    166 |  898716289 |
+--------+------------+

Last updated: 19 May 2021