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Wagstaff (probable) Primes
Term: (2p + 1) / 3 Exhaustive-search-table, see b = 2 Total: 44 Reference: PrimePages & Mersenneforum |
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| Number | Digits | When | Who | Status on factordb |
PrimePages - ID |
|---|---|---|---|---|---|
| (215135397 + 1) / 3 | 4556209 | Jun 2021 | Ryan Propper | PRP | |
| (213372531 + 1) / 3 | 4025533 | Sep 2013 | Ryan Propper | PRP | |
| (213347311 + 1) / 3 | 4017941 | Sep 2013 | Ryan Propper | PRP | |
| (24031399 + 1) / 3 | 1213572 | Feb 2010 | Tony Reix;Diepeveen-Underwood-Reix | PRP | |
| (2986191 + 1) / 3 | 296873 | Jun 2008 | Vincent Diepeveen | PRP | |
| (2374321 + 1) / 3 | 112682 | Dec 2000 | Henri & Renaud Lifchitz | PRP | |
| (2269987 + 1) / 3 | 81274 | Oct 2000 | Henri & Renaud Lifchitz | PRP | |
| (2267017 + 1) / 3 | 80380 | Sep 2000 | Henri & Renaud Lifchitz | PRP | |
| (2141079 + 1) / 3 | 42469 | Oct 2025 | Henri & Renaud Lifchitz; Paul Underwood; CM | Prime | 141182 |
| (2138937 + 1) / 3 | 41824 | Oct 2023 | Andreas Enge; Paul Underwood; CM | Prime | 136562 |
| (2127031 + 1) / 3 | 38240 | Jan 2023 | Paul Underwood; CM | Prime | 134830 |
| (2117239 + 1) / 3 | 35292 | Aug 2022 | Ryan Propper; CM | Prime | 134282 |
| (295369 + 1) / 3 | 28709 | Aug 2021 | Laurent Facq; Jared Asuncion; Bill Allombert | Prime | 132583 |
| (283339 + 1) / 3 | 25088 | Sep 2014 | Tom Wu; Primo | Prime | 118512 |
| (242737 + 1) / 3 | 12865 | Aug2007 | François Morain | Prime | 82071 |
| (214479 + 1) / 3 | 4359 | Nov 2004 | David Broadhurst; Primo | Prime | 74683 |
| (212391 + 1) / 3 | 3730 | May 1996 | François Morain | Prime | 27688 |
| (211279 + 1) / 3 | 3395 | Jan 1998 | Preda Mihailescu | Prime | 28909 |
| (210691 + 1) / 3 | 3218 | Oct 2004 | David Broadhurst; Primo | Prime | 74682 |
| (210501 + 1) / 3 | 3161 | May 1996 | François Morain | Prime | 29287 |
| (25807 + 1) / 3 | 1748 | 1998 | Preda Mihailescu | Prime | 72546 |
| (23539 + 1) / 3 | 1065 | 1989 | François Morain | Prime | 54344 |
| (22617 + 1) / 3 | 788 | Prime | |||
| (21709 + 1) / 3 | 514 | Prime | |||
| (2701 + 1) / 3 | 211 | Prime | |||
| (2347 + 1) / 3 | 104 | Prime | |||
| (2313 + 1) / 3 | 94 | Prime | |||
| (2199 + 1) / 3 | 60 | Prime | |||
| (2191 + 1) / 3 | 58 | Prime | |||
| (2167 + 1) / 3 | 50 | Prime | |||
| (2127 + 1) / 3 | 38 | Prime | |||
| (2101 + 1) / 3 | 30 | Prime | |||
| (279 + 1) / 3 | 24 | Prime | |||
| (261 + 1) / 3 | 18 | Prime | |||
| (243 + 1) / 3 | 13 | Prime | |||
| (231 + 1) / 3 | 9 | Prime | |||
| (223 + 1) / 3 | 7 | Prime | |||
| (219 + 1) / 3 | 6 | Prime | |||
| (217 + 1) / 3 | 5 | Prime | |||
| (213 + 1) / 3 | 4 | Prime | |||
| (211 + 1) / 3 | 3 | Prime | |||
| (25 + 1) / 3 | 2 | Prime | |||
| (27 + 1) / 3 | 2 | Prime | |||
| (23 + 1) / 3 | 1 | Prime |