Dual Cullen (probable) Primes
Term: bn + n
{ not listed here n < b where bn < 101000 }
Exhaustive-search-table
Total: 107
PRP: 37   Prime: 70

References: Dual Cullen on Mersenneforum, PRP Top-10000 by Lifchitz
get informations as a txt-format
Rank Number Digits When PRP found by ... Status on
factordb
1 111181716 + 1181716 1230631 Jul 2023 Kellen Shenton PRP
2 51375156 + 1375156 961193 Sep 2025 Anonymous PRP
3 89367176 + 367176 715770 Mar 2025 Kellen Shenton PRP
4 73197880 + 197880 368715 Jun 2023 Kellen Shenton PRP
5 43141090 + 141090 230467 Jun 2023 Kellen Shenton PRP
6 2678561 + 678561 204268 May 2006 Henri Lifchitz PRP
7 5385114 + 85114 146761 May 2022 Kellen Shenton PRP
8 7975948 + 75948 144121 Jun 2023 Kellen Shenton PRP
9 1957910 + 57910 74053 May 2022 Kellen Shenton PRP
10 685481 + 85481 66518 Aug 2014 Henri Lifchitz PRP
11 4108889 + 108889 65558 Mar 2024 Hugo Pfoertner PRP
12 2204129 + 204129 61449 Apr 2002 Henri Lifchitz PRP
13 6129226 + 29226 52179 Jun 2023 Kellen Shenton PRP
14 288071 + 88071 26513 Sep 2001 Henri Lifchitz Prime
15 1023769 + 23769 23770 Oct 2001 Milton L. Brown Prime
16 533054 + 33054 23104 Jul 2025 Anonymous PRP
17 718960 + 18960 16024 Mar 2024 Anonymous PRP
18 459424 + 9424 15580 Nov 2025 Norman Luhn PRP
19 522102 + 22102 15449 May 2025 Anonymous PRP
20 468923 + 8923 14837 Nov 2025 Norman Luhn PRP
21 1013807 + 13807 13808 Jul 2001 Milton L. Brown Prime
22 297942 + 7942 11615 Oct 2025 Norman Luhn PRP
23 516176 + 6176 10546 Nov 2025 Norman Luhn PRP
24 187541 + 7541 9467 Oct 2025 Norman Luhn PRP
25 99602 + 9602 9163 Oct 2025 Norman Luhn PRP
26 318248 + 18248 8707 Oct 2025 Norman Luhn PRP
27 127969 + 7969 8600 Oct 2025 Norman Luhn PRP
28 395390 + 5390 8576 Nov 2025 Norman Luhn PRP
29 255538 + 5538 7742 Oct 2025 Norman Luhn PRP
30 412793 + 12793 7703 Feb 2020 Jinyuan Wang PRP
31 78578 + 8578 7250 Oct 2025 Anonymous PRP
32 444325 + 4325 7108 Nov 2025 Norman Luhn PRP
33 453878 + 3878 6412 Nov 2025 Norman Luhn PRP
34 383789 + 3789 5986 Nov 2025 Norman Luhn PRP
35 57954 + 7954 5560 Aug 2023 Anonymous Prime
36 203891 + 3891 5063 Oct 2025 Anonymous PRP
37 184015 + 4015 5040 Oct 2025 Norman Luhn PRP
38 333100 + 3100 4708 Oct 2025 Norman Luhn PRP
39 233100 + 3100 4222 Oct 2025 Norman Luhn PRP
40 211795 + 11795 3551 May 2017 Edwin Hall Prime
41 282253 + 2253 3261 Oct 2025 Norman Luhn PRP
42 64027 + 4027 3134 Sep 2012 Bruno Berselli Prime
43 282133 + 2133 3087 Oct 2025 Norman Luhn PRP
44 63793 + 3793 2952 Sep 2012 Vincenzo Librandi Prime
45 242075 + 2075 2864 Dec 2023 Anonymous Prime
46 381739 + 1739 2748 Dec 2020 Masaki UKAI Prime
47 171960 + 1960 2412 Dec 2020 Masaki UKAI Prime
48 461353 + 1353 2250 Nov 2025 Norman Luhn Prime
49 231588 + 1588 2163 Dec 2020 Masaki UKAI Prime
50 281279 + 1279 1851 Oct 2025 Norman Luhn Prime
51 261283 + 1283 1816 Oct 2025 Norman Luhn Prime
52 171080 + 1080 1329 Aug 2017 Pakaran Prime
53 36715 + 715 1113 Nov 2025 Norman Luhn Prime
54 61357 + 1357 1056 Jul 2018 Ben Chaffin Prime
55 23225 + 3225 971 Prime
56 46583 + 583 970 Prime
57 23201 + 3201 964 Prime
58 16793 + 793 955 Prime
59 34559 + 559 857 Prime
60 41233 + 1233 743 Prime
61 31532 + 1532 731 Prime
62 6761 + 761 593 Prime
63 21881 + 1881 567 Prime
64 10451 + 451 452 Prime
65 22315 + 315 423 Prime
66 21311 + 1311 395 Prime
67 40237 + 237 380 Prime
68 47214 + 214 358 Prime
69 12319 + 319 345 Prime
70 14299 + 299 343 Prime
71 44203 + 203 334 Prime
72 14279 + 279 320 Prime
73 10313 + 313 314 Prime
74 23202 + 202 276 Prime
75 6305 + 305 238 Prime
76 2735 + 735 222 Prime
77 14185 + 185 213 Prime
78 2701 + 701 212 Prime
79 20123 + 123 161 Prime
80 4225 + 225 136 Prime
81 3071 + 71 105 Prime
82 2317 + 317 96 Prime
83 8101 + 101 92 Prime
84 4133 + 133 81 Prime
85 2851 + 51 74 Prime
86 976 + 76 73 Prime
87 1069 + 69 70 Prime
88 1354 + 54 61 Prime
89 1544 + 44 52 Prime
90 485 + 85 52 Prime
91 1835 + 35 44 Prime
92 748 + 48 41 Prime
93 1235 + 35 38 Prime
94 1526 + 26 31 Prime
95 734 + 34 29 Prime
96 289 + 89 27 Prime
97 1223 + 23 25 Prime
98 281 + 81 25 Prime
99 275 + 75 23 Prime
100 437 + 37 23 Prime
101 1417 + 17 20 Prime
102 334 + 34 17 Prime
103 239 + 39 12 Prime
104 215 + 15 5 Prime
105 29 + 9 3 Prime
106 25 + 5 2 Prime
107 23 + 3 2 Prime