Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 198: | \[{31^{198}-1\over30}\] | 25 × 32 × 72 × 19 × 23 × 67 × 199 × 331 × 397 × 577 × 617 × 991 × 3637 × 8713 × 81343 × 204733 × 297991 × 430057 × 757241 × 1538083 × 150332843 × 291207313 × 1048563011 × 36093579787<11> × 294573316951<12> × 24763965905251<14> × 215792743120601131<18> × 3763784187326467459<19> × 869535983092745596321<21> × 34731987261785578083133<23> × 650141690025315305584300036801<30> × 11220184499000850518640322183136835212662188162247441094347<59> |