Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 542: | \[{20^{542}-1\over19}\] | 3 × 7 × 1627 × 11383 × 195121 × 17305745641<11> × 19025013001<11> × 740958963395891<15> × 16674281171045507<17> × 137848069582082921<18> × 4015208463415595125549<22> × [24955614489229346795265329554975647570141107210854433260146269146732165299971525860493750950709793803575469760329148542098800440003004307912554215190497644384605173529048153504411590390862184277383382080166503786855492337296542654235800414954688113190932745714734137670832414617393135149249659<293>] × [17770630731991908951233211417354449357316442672666666510373567319246065671235158249290077332199930518302898638618734170691539749585028606544144551241353474434741587632073808116664069423197400519542356996337330581558307481315547912932801110126262278694810243234993599765550808889075759837652709102267232809643<308>] |