Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 494: | \[{20^{494}-1\over19}\] | 3 × 7 × 19 × 2081 × 2549 × 3121 × 142559 × 159563 × 9690539 × 230065681 × 735408649 × 75368484119<11> × 109850818001<12> × 192696104561<12> × 2272727294381<13> × 41413929827219<14> × 4460872019481639529<19> × [2353881643573928108692218085404341129602188240642302178666027363933466642862988707386141992611644179812236850482030031624714269850645050648986056763517155772398767188417524786145379392739157805921850642854085183569517102631668417765917232951<241>] × [693004683115666192557083727425783596809640323665506482829002871285558632575128387239943606731004864175494165072369680537051828546748986068513672869397294305283766396005045382256509097114360815826699799398749955127397295224140572232703693976384446660746001829368451832066331167<276>] |