Wagstaff (probable) Primes
Term: (2p + 1) / 3
Total: 44

Reference: PrimePages & Mersenneforum
Rank Number Digits When Who Status on
factordb
PrimePages - ID
1 (215135397 + 1) / 3 4556209 Jun 2021 Ryan Propper PRP -
2 (213372531 + 1) / 3 4025533 Sep 2013 Ryan Propper PRP -
3 (213347311 + 1) / 3 4017941 Sep 2013 Ryan Propper PRP -
4 (24031399 + 1) / 3 1213572 Feb 2010 Tony Reix;Diepeveen-Underwood-Reix PRP -
5 (2986191 + 1) / 3 296873 Jun 2008 Vincent Diepeveen PRP -
6 (2374321 + 1) / 3 112682 Dec 2000 Henri & Renaud Lifchitz PRP -
7 (2269987 + 1) / 3 81274 Oct 2000 Henri & Renaud Lifchitz PRP -
8 (2267017 + 1) / 3 80380 Sep 2000 Henri & Renaud Lifchitz PRP -
9 (2141079 + 1) / 3 42469 Sep 2000 Henri & Renaud Lifchitz PRP -
10 (2138937 + 1) / 3 41824 Oct 2023 Andreas Enge; Paul Underwood; CM Prime 136562
11 (2127031 + 1) / 3 38240 Jan 2023 Paul Underwood; CM Prime 134830
12 (2117239 + 1) / 3 35292 Aug 2022 Ryan Propper; CM Prime 134282
13 (295369 + 1) / 3 28709 Aug 2021 Laurent Facq; Jared Asuncion; Bill Allombert Prime 132583
14 (283339 + 1) / 3 25088 Sep 2014 Tom Wu; Primo Prime 118512
15 (242737 + 1) / 3 12865 Aug2007 François Morain Prime 82071
16 (214479 + 1) / 3 4359 Nov 2004 David Broadhurst; Primo Prime 74683
17 (212391 + 1) / 3 3730 May 1996 François Morain Prime 27688
18 (211279 + 1) / 3 3395 Jan 1998 Preda Mihailescu Prime 28909
19 (210691 + 1) / 3 3218 Oct 2004 David Broadhurst; Primo Prime 74682
20 (210501 + 1) / 3 3161 May 1996 François Morain Prime 29287
21 (25807 + 1) / 3 1748 1998 Preda Mihailescu Prime 72546
22 (23539 + 1) / 3 1065 1989 François Morain Prime 54344
23 (22617 + 1) / 3 788 - - Prime -
24 (21709 + 1) / 3 514 - - Prime -
25 (2701 + 1) / 3 211 - - Prime -
26 (2347 + 1) / 3 104 - - Prime -
27 (2313 + 1) / 3 94 - - Prime -
28 (2199 + 1) / 3 60 - - Prime -
29 (2191 + 1) / 3 58 - - Prime -
30 (2167 + 1) / 3 50 - - Prime -
31 (2127 + 1) / 3 38 - - Prime -
32 (2101 + 1) / 3 30 - - Prime -
33 (279 + 1) / 3 24 - - Prime -
34 (261 + 1) / 3 18 - - Prime -
35 (243 + 1) / 3 13 - - Prime -
36 (231 + 1) / 3 9 - - Prime -
37 (223 + 1) / 3 7 - - Prime -
38 (219 + 1) / 3 6 - - Prime -
39 (217 + 1) / 3 5 - - Prime -
40 (213 + 1) / 3 4 - - Prime -
41 (211 + 1) / 3 3 - - Prime -
42 (25 + 1) / 3 2 - - Prime -
43 (27 + 1) / 3 2 - - Prime -
44 (23 + 1) / 3 1 - - Prime -