Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 541: | \[{4^{541}-1\over3}\] | 86561 × 59199467 × 396588707 × 4312790327<10> × 512917469041<12> × 6115209994009<13> × 301118908380643<15> × 84163674336698854450433<23> × 77146448294831869472151022106713<32> × 904106555381898703253733254107256591<36> × 901912542742250747662095103224539896393<39> × 100705076277028140414573036353559088974376377685400737<54> × 3913112911835820709255943886069525362580351752909309688547154382752707879<73> |