Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
171: | \[{20^{171}-1\over19}\] | 19 × 229 × 421 × 64008001 × 75368484119<11> × 192696104561<12> × 1374892397251<13> × 207373637974370334920244263016739<33> × 187264653764095586664819173388580537613342284054996019397698915269<66> × 1732724154386392878105444638522339285040431386224361108901067218292376986829<76> |