Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[{28^{266}-1\over27}\] | 29 × 113 × 11971 × 13007 × 35771 × 214663 × 221047 × 1879291 × 2913233 × 4422461 × 21084187 × 268442413 × 2298760031 × 1340134333297229<16> × 352839207641408377<18> × 530795452578128557<18> × 5504044949138999959<19> × 163823513844829941439<21> × 108044981035496842464510517<27> × 10699069807168358380756029241526630364448396172426527355135591141194256137<74> × 4561624887977679848933162147577525605222422443335850057720652079444297664198848221051207376735096470015885732291219068991373<124> |