Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 646: | \[{5^{646}-1\over4}\] | 2 × 3 × 191 × 409 × 647 × 761 × 3061 × 6271 × 18089 × 19609 × 213029 × 3981071 × 41540861 × 466344409 × 3247691391126251<16> × 727007771958290921190121741<27> × 1106833331463912890399339855877003093911395487<46> × 824025642333621472612253607491152025643258690550015151<54> × 708062099953126128600812802478694643865554550280893749088603<60> × 4520075300365525822415973296109200878340148487916084028121991<61> × 361852038737893203912320967309328726432558549326348688107031007<63> × 132981150324062454692451481044833258173562011479994362058454095433879531<72> |