Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 563: | \[{4^{563}-1\over3}\] | 522114085011580241<18> × 74906924194076922022321<23> × 2815747080256641401887817<25> × 13299213974872825932452460424235657<35> × 806246686530274231554002548822879844631710799886320977786718630531739958469131883287342678637275814925394111503<111> × 257323192135759555839256711094215328226631894731631722581616062225895353265033689946560613273119450096627691636333654303452465323<129> |