Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 388: | \[{20^{388}-1\over19}\] | 3 × 7 × 389 × 401 × 1002204583 × 9446725241<10> × 53678965801<11> × 36312512210449<14> × 3458308355911001<16> × 1814565957918978949<19> × 375921460689078723273556870099<30> × 49613947804350394354357836874439<32> × 2645332912014287669339495089951567<34> × 24087249964807710583843491880243798561<38> × 4268250703588644617929155594605677521016797237122821<52> × 198267509628256090662422470734434075176908933050913075570220980192052807097193597059033125414493397870953895037<111> × 869694931039719738208080237616399222417946837701856636094076580311629428368834738136020485834646452211422327785202220775805877<126> |