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Repunit (probable) Primes
Term: Rn = (10n − 1) / 9 Total: 11 Exhaustive-search-table, see b = 10 References: PrimePages |
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| # | RIndices | Digits | When | PRP found by ... | Status on factordb |
PrimePages - ID |
|---|---|---|---|---|---|---|
| 11 | R8177207 | 8177207 | May 2021 | Ryan Propper, Serge Batalov | PRP | |
| 10 | R5794777 | 5794777 | May 2021 | Ryan Propper, Serge Batalov | PRP | |
| 9 | R270343 | 270343 | Jul 2007 | Maksym Voznyy, Anton Budnyy | PRP | |
| 8 | R109297 | 109297 | Apr 2007 26 May 2025 |
Bourdelais and Harvey Dubner Paul Underwood, Andreas Enge (proven prime via CM) |
Prime | 140799 |
| 7 | R86453 | 86453 | Oct 2000 15 May 2023 |
Lew Baxter Andreas Enge (proven prime via CM) |
Prime | 136044 |
| 6 | R49081 | 49081 | Sep 1999 Mar 2022 |
Harvey Dubner Paul Underwood (proven prime via Primo) |
Prime | 133761 |
| 5 | R1031 | 1031 | Dec 1985 | Harvey Dubner & Hugh C. Williams | Prime | 55968 |
| 4 | R317 | 317 | Prime | |||
| 3 | R23 | 23 | Prime | |||
| 2 | R19 | 19 | Prime | |||
| 1 | R2 | 2 | Prime |