Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 411: | \[{4^{411}-1\over3}\] | 3 × 7 × 823 × 1097 × 15619 × 7663507 × 2017223347 × 2707079449 × 27261904199932321<17> × 32127963626435681<17> × 105498212027592977<18> × 32032215596496435569<20> × 5439042183600204290159<22> × 647923469936355993348337<24> × 298291609560028759691116319707152042481<39> × 241777014709302954850239652300043393011478307432536296651<57> |