Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 378: | \[{21^{378}-1\over20}\] | 2 × 11 × 19 × 37 × 43 × 109 × 127 × 163 × 199 × 337 × 379 × 421 × 463 × 613 × 631 × 757 × 3319 × 4789 × 5077 × 6427 × 17497 × 51787 × 516349 × 734329 × 4779433 × 81867661 × 85775383 × 227633407 × 4167831781 × 22125429901<11> × 7429452749713<13> × 22864311556633<14> × 27186384126763<14> × 164687866184773<15> × 4527391635851869<16> × 7101932659132249<16> × 29530378898266681<17> × 100595851688887003<18> × 231877932177836345689<21> × 559529226207687925351<21> × 96147459008542768120973717977<29> × 592823611828574163154462624637481670158792334981<48> × 158960891807692552808356500085059265746129175440701992893457<60> × 134838961246720964471705379905876137706996255029487787547601022951865575016401042181<84> |