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 2021-11-27, 15:00 #12 MattcAnderson     "Matthew Anderson" Dec 2010 Oregon, USA 953 Posts I made a long-ish list of prime triple patterns or 3-tuples already in the database. Some entries from The Online Encyclopedia of Integer Sequences A022004 Initial members of prime triples (p, p+2, p+6). 5,11,17,41,101,107 and so on A046134 p, p+2 and p+8 are primes. 3, 5, 11, 29, 59, 71, 101, 149, 191, 269 and so on A046135 Primes p such that p+2 and p+12 are primes. 5, 11, 17, 29, 41, 59, 71, 101, 137, 179, 227, 239, 269, 281, 347, 419 and so on A046136 Primes p such that p, p+4 and p+10 are primes. 3, 7, 13, 19, 37, 43, 79, 97, 103, 127, 163, 223, 229, 307, 349, 379, 439 and so on A046137 Primes p such that p+4 and p+12 are also prime. 7, 19, 67, 97, 127, 229, 397, 487, 739, 757, 907, 1009 and so on A046138 p, p+6 and p+8 are primes. 5, 11, 23, 53, 101, 131, 173, 191, 233, 263, 563, 593, 653 and so on A046139 p, p+6 and p+10 are primes. A046141 p, p+8 and p+12 are primes. I have tried to contribute a few prime triples to OEIS but was told that these sequences are 'not of general interest'. Maybe someone else would like to try. Note the pattern Primes p such that p, p+2 and p+14 is not in the OEIS database. It starts with 3,5,17,29,59,137,149,179,197,227,269,419,599,617,659,809,1019,1049,1277,1289,1607,1787,1997 and so on. Any takers? Regards, Matt
 2021-11-27, 17:01 #13 MattcAnderson     "Matthew Anderson" Dec 2010 Oregon, USA 16718 Posts triple prime log Again, If someone wants to put a few prime triples in OEIS, you can try. I also tried (0, 2, 20) but that one was rejected too. "not of general interest". But I have made donations to OEIS and I received a holiday card from Neil Sloan himself, so the wheel may be greased. Regards, Matt
2021-11-28, 05:29   #14
MattcAnderson

"Matthew Anderson"
Dec 2010
Oregon, USA

95310 Posts
a short calculation

Now I have a calculation to share. It is a 3-tuple. Pattern is (0,2,18). I 'dialed it in' to fit on one piece of paper, and printed one. I used Maple computer algebra system and computer language.

I bet you can't calculate more

Look

Matt

Eddited to add - Have you ever dialed in a radio station? It is fun. Some of us know the joy of finding special numbers. You, dear reader, and I are special. We are elite. Some people can't even read. Best of luck. M
Attached Files
 a k tuple example 3 tuple calculation Matt C Anderson.pdf (150.7 KB, 5 views)

Last fiddled with by MattcAnderson on 2021-11-28 at 06:29 Reason: got bored

2021-11-29, 11:37   #15
MattcAnderson

"Matthew Anderson"
Dec 2010
Oregon, USA

16718 Posts
Triple prime search with pattern (0, 2, 20)

Where 20 is an arbitrary parameter :-)
This is what I was told by an OEIS.org referee. *sigh*

Hi again all,

Here are more triple prime search data. It is for
your enjoyment. I put it on this public forum so that
it may be shared. These are prime numbers p such that
p, p+2, and p+20 are all prime numbers.
So, this is a pattern of (0, 2, 20). And these are
the smallest such positive prime numbers. And all
prime numbers are positive integers.

Again, someone else can try to put this in OEIS.
Because, hey mankind needs to know this.
(But maybe, 'not of general interest')

Regards,
Matt

Attached Files
 Maple's isprime and ifactor commands.pdf (91.5 KB, 4 views) a k tuple example 3 tuple calculation pattern 0 2 20.pdf (167.8 KB, 5 views)

 2021-11-29, 13:38 #16 kar_bon     Mar 2006 Germany 2×7×11×19 Posts You could use PFGW with this script: Code: ABC2 $a &$a+2 & \$a+20 a: from 1 to 20000 step 2 This will find all triples to n=20k within a minute! The log file "pfgw-prime.log" will contain all pairs in this form: Code: 3 3+2 3+20 - Complete Set -
 2021-11-29, 13:51 #17 Dr Sardonicus     Feb 2017 Nowhere 120008 Posts Just to make the list a bit more exclusive, I told Pari-GP to look for primes p such that p + 2 and p + 18 were the next two consecutive primes. With the small limit I chose, it would have taken more time figuring out time saving refinements than it took to write and run a mindless script. Code: k=0;forprime(p=3,35000,q=nextprime(p+1);r=nextprime(q+1);if(q-p==2&&r-q==16,k++;print(k" "p" "q" "r))) 1 1931 1933 1949 2 2111 2113 2129 3 2591 2593 2609 4 2801 2803 2819 5 3119 3121 3137 6 3371 3373 3389 7 3389 3391 3407 8 5021 5023 5039 9 5279 5281 5297 10 5879 5881 5897 11 6761 6763 6779 12 7331 7333 7349 13 9011 9013 9029 14 9239 9241 9257 15 10271 10273 10289 16 11351 11353 11369 17 11699 11701 11717 18 16631 16633 16649 19 17579 17581 17597 20 17789 17791 17807 21 18059 18061 18077 22 18311 18313 18329 23 18521 18523 18539 24 19139 19141 19157 25 20231 20233 20249 26 20771 20773 20789 27 22091 22093 22109 28 22619 22621 22637 29 24179 24181 24197 30 26861 26863 26879 31 27281 27283 27299 32 30011 30013 30029 33 31121 31123 31139 34 32141 32143 32159 35 32939 32941 32957 36 33809 33811 33827 37 34649 34651 34667 ?
2021-11-29, 19:52   #18
Dr Sardonicus

Feb 2017
Nowhere

210·5 Posts

Quote:
 Originally Posted by MattcAnderson Where 20 is an arbitrary parameter :-) This is what I was told by an OEIS.org referee.
In the spirit of "20 is an arbitrary parameter," the following mindless script looks for a triple p, p + 2, p + k which are consecutive primes, for even integers k > 2 which are not congruent to 1 (mod 3). I ran the thing out to fifty million. The triples found may not be the least for the indicated k.

Code:
? k=4;d=2;forprime(p=5,50000000,q=nextprime(p+1);r=nextprime(q+1);if(q-p==2&&r-q==k,print(k+2" "p" "q" "r);k+=d;d=6-d))
6 5 7 11
8 29 31 37
12 137 139 149
14 197 199 211
18 1931 1933 1949
20 4157 4159 4177
24 7127 7129 7151
26 12071 12073 12097
30 13337 13339 13367
32 13931 13933 13963
36 20441 20443 20477
38 28349 28351 28387
42 38459 38461 38501
44 58787 58789 58831
48 163061 163063 163109
50 172439 172441 172489
54 405089 405091 405143
56 439007 439009 439063
60 510617 510619 510677
62 667019 667021 667081
66 997811 997813 997877
68 1128821 1128823 1128889
72 1149059 1149061 1149131
74 1152419 1152421 1152493
78 1188071 1188073 1188149
80 1354391 1354393 1354471
84 1448219 1448221 1448303
86 1601867 1601869 1601953
90 3227039 3227041 3227129
92 4575377 4575379 4575469
96 4797071 4797073 4797167
98 4927931 4927933 4928029
102 5723897 5723899 5723999
104 8981459 8981461 8981563
108 12591041 12591043 12591149
110 13545797 13545799 13545907
114 15492437 15492439 15492551
116 15879047 15879049 15879163
120 16054277 16054279 16054397
122 18931697 18931699 18931819
126 36084311 36084313 36084437
128 43469651 43469653 43469779
?

Last fiddled with by Dr Sardonicus on 2021-11-29 at 20:49 Reason: w

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