Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 225: | \[{21^{225}-1\over20}\] | 52 × 151 × 211 × 463 × 1051 × 1801 × 9391 × 18181 × 40841 × 2031851 × 41489011 × 57815101 × 85775383 × 9728219701<10> × 45237496501<11> × 201307465501<12> × 9725237898751<13> × 22554946693833031<17> × 27385718497004633851<20> × 138288178346489520230701<24> × 904997543720474875243278413862398701<36> × 1164847766331259763856928676605541764801227071331178051502907774043159575558388940503465789046082751<100> |