Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 330: | \[{21^{330}-1\over20}\] | 2 × 5 × 112 × 23 × 31 × 67 × 211 × 331 × 421 × 463 × 881 × 2551 × 2971 × 3301 × 3499 × 6073 × 9391 × 18181 × 28513 × 33199 × 40841 × 185641 × 372901 × 501001 × 10362529 × 5664205361<10> × 182894303461<12> × 15944511496321<14> × 17513875027111<14> × 87989435079877<14> × 20651477307391591<17> × 28503846834226831<17> × 270573999780463721<18> × 8407123807237422961<19> × 54598616218616435702441<23> × 3955202198062795629622003<25> × 3246571517440758538481384401171<31> × 237967900696723393143507690151891<33> × 12445053671159143233988565211478891<35> × 290876372783240399399264359363201321<36> × 59719533016300667659019765187139199581471<41> |