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#14 by Charles R Greathouse IV at Thu Sep 08 08:45:39 EDT 2022
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(MAGMAMagma) [NthPrime(n): n in [5..2*10^3] | IsPrime(NthPrime(n) div 3) and IsPrime(3*NthPrime(n)+2)]; // Vincenzo Librandi, Mar 08 2018
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Discussion
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| Thu Sep 08
| 08:45
| OEIS Server: https://oeis.org/edit/global/2944
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#13 by Bruno Berselli at Thu Mar 08 02:44:13 EST 2018
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#12 by Vincenzo Librandi at Thu Mar 08 01:19:41 EST 2018
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#11 by Vincenzo Librandi at Thu Mar 08 01:19:25 EST 2018
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(MAGMA) [NthPrime(n): n in [5..2*10^3] | IsPrime(NthPrime(n) div 3) and IsPrime(3*NthPrime(n)+2)]; // Vincenzo Librandi, Mar 08 2018
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proposed
editing
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#10 by Michel Marcus at Thu Mar 08 00:51:26 EST 2018
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#9 by Michel Marcus at Thu Mar 08 00:50:23 EST 2018
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| NAME
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Primes p of the form : (p-n)/(n+1)=prime and (n+1)*p+n=prime. n=2.
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| COMMENTS
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This is the general form : (p-n)/(n+1)=prime and (n+1)*p+n=prime; 'Safe' primes and' 'Sophie Germain' primes just one part of this general form; If n=1 then we got' 'Safe' primes and' 'Sophie Germain' primes.
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proposed
editing
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Discussion
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| Thu Mar 08
| 00:51
| Michel Marcus: Added p to name; perhaps name should rather be: Primes p that satisfy ....
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#8 by Altug Alkan at Wed Mar 07 23:32:10 EST 2018
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#7 by Altug Alkan at Wed Mar 07 23:30:50 EST 2018
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#6 by Altug Alkan at Wed Mar 07 23:29:47 EST 2018
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#5 by Altug Alkan at Wed Mar 07 23:26:44 EST 2018
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(PARI) lista(nn) = forprime(p=17, nn, if(isprime(3*p+2) && isprime(p\3), print1(p", "))); \\ Altug Alkan, Mar 07 2018
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| CROSSREFS
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Cf. A059455.
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proposed
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