Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
131: | \[{22^{131}-1\over21}\] | 263 × 3407 × 14411 × 35681628401299<14> × 7441923934655859064535453857645950474897420358378623162486888600654530388652379199327161444924584313854424543113866829254230592311913836141679426473563<151> |