Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[{13^{261}-1\over12}\] | 32 × 61 × 523 × 1973 × 2843 × 3539 × 8527 × 1609669 × 22827061 × 1457191193743<13> × 846041103974872866961<21> × 808648601294417626878199<24> × 32188981953012087857559765746138617<35> × 22831887214068178836810445781616839761023372133897<50> × 34936181066861953264973126346393605512250078285832697132390974675718988061796432833434386264720082759968606341070177<116> |