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发表于 2021-5-14 09:58
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p#±1中的素数
p#=2*3*5*7*…,是合数不用再说;p#±1本应是素数,但它们中的素数并不多,特别是p#±1同时是素数的更少。
Primes near to #Pn (form #Pn - a, #Pn + b) for n=1, ... , 437
n |prime| -a, b
2 | 3 | -1, 1
3 | 5 | -1, 1
4 | 7 | -11, 1
5 | 11 | -1, 1
6 | 13 | -1, 17
7 | 17 | -29, 19
8 | 19 | -23, 23
9 | 23 | -43, 37
10 | 29 | -41, 61
11 | 31 | -73, 1
12 | 37 | -59, 61
13 | 41 | -1, 71
14 | 43 | -89, 47
15 | 47 | -67, 107
16 | 53 | -73, 59
17 | 59 | -107, 61
18 | 61 | -89, 109
19 | 67 | -101, 89
20 | 71 | -127, 103
21 | 73 | -97, 79
22 | 79 | -83, 151
23 | 83 | -89, 197
24 | 89 | -1, 101
25 | 97 | -251, 103
26 | 101 | -131, 233
27 | 103 | -113, 223
28 | 107 | -151, 127
29 | 109 | -263, 223
30 | 113 | -251, 191
31 | 127 | -223, 163
32 | 131 | -179, 229
33 | 137 | -389, 643
34 | 139 | -281, 239
35 | 149 | -151, 157
36 | 151 | -197, 167
37 | 157 | -173, 439
38 | 163 | -239, 239
39 | 167 | -233, 199
40 | 173 | -191, 191
41 | 179 | -223, 199
42 | 181 | -223, 383
43 | 191 | -293, 233
44 | 193 | -593, 751
45 | 197 | -293, 313
46 | 199 | -457, 773
47 | 211 | -227, 607
48 | 223 | -311, 313
49 | 227 | -373, 383
50 | 229 | -257, 293
51 | 233 | -307, 443
52 | 239 | -313, 331
53 | 241 | -607, 283
54 | 251 | -347, 277
55 | 257 | -317, 271
56 | 263 | -307, 401
57 | 269 | -677, 307
58 | 271 | -467, 331
59 | 277 | -317, 379
60 | 281 | -431, 491
61 | 283 | -479, 331
62 | 293 | -509, 311
63 | 307 | -601, 397
64 | 311 | -331, 331
65 | 313 | -379, 353
66 | 317 | -1, 419
67 | 331 | -449, 421
68 | 337 | -1, 883
69 | 347 | -1163, 547
70 | 349 | -449, 1381
71 | 353 | -443, 457
72 | 359 | -499, 457
73 | 367 | -373, 373
74 | 373 | -467, 421
75 | 379 | -619, 1
76 | 383 | -599, 1061
77 | 389 | -691, 523
78 | 397 | -443, 499
79 | 401 | -449, 619
80 | 409 | -1123, 727
81 | 419 | -439, 457
82 | 421 | -677, 509
83 | 431 | -433, 439
84 | 433 | -599, 911
85 | 439 | -881, 461
86 | 443 | -593, 823
87 | 449 | -661, 613
88 | 457 | -1583, 617
89 | 461 | -1021, 1021
90 | 463 | -521, 523
91 | 467 | -677, 941
92 | 479 | -509, 653
93 | 487 | -863, 601
94 | 491 | -677, 877
95 | 499 | -587, 607
96 | 503 | -659, 631
97 | 509 | -541, 733
98 | 521 | -619, 757
99 | 523 | -773, 877
100 | 541 | -1013, 641
以下略
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