A136085 -id:A136085 - cp's OEIS frontend

A157975 Primes p such that 16*p + 15 is also prime.

2, 7, 11, 13, 23, 29, 37, 53, 61, 67, 71, 79, 89, 97, 103, 109, 113, 131, 137, 139, 149, 167, 179, 197, 211, 223, 257, 277, 293, 313, 317, 337, 379, 383, 397, 419, 431, 439, 443, 467, 571, 601, 617, 631, 641, 643, 653, 659, 677, 691, 719, 733, 739, 743, 809

Offset: 1

Vladimir Joseph Stephan Orlovsky, Mar 10 2009

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Cf. A136082, A136083, A023213, A023221, A023235, A023240, A157974, A136083, A136084, A089440, A136085

[n: n in [0..1000] | IsPrime(n) and IsPrime(16*n + 15)]; // Vincenzo Librandi, Feb 03 2014

q=15;lst={};Do[p=Prime[n];If[PrimeQ[(q+1)*p+q],AppendTo[lst,p]],{n,6!}];lst
Select[Prime[Range[1000]], PrimeQ[16 # + 15]&] (* Vincenzo Librandi, Feb 03 2014 *)

A157978 Primes p such that 4*p - 3 is also a prime.

Original entry on oeis.org

2, 5, 11, 19, 23, 29, 59, 61, 71, 79, 89, 101, 103, 109, 113, 131, 149, 151, 191, 193, 233, 239, 263, 283, 313, 331, 353, 359, 373, 389, 401, 431, 439, 479, 499, 521, 523, 541, 569, 571, 599, 619, 631, 653, 659, 673, 683, 701, 709, 739, 743, 751, 761, 773, 829

Offset: 1

Vladimir Joseph Stephan Orlovsky, Mar 10 2009

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Cf. A136082, A136083, A023213, A023221, A023235, A023240, A157974, A136083, A136084, A136085, A136086, A136087, A089440, A157975, A157976, A157977.

[n: n in [0..2000] | IsPrime(n) and IsPrime(4*n - 3)]; // Vincenzo Librandi, Feb 03 2014

q=3;lst={};Do[p=Prime[n];If[PrimeQ[(q+1)*p-q],AppendTo[lst,p]],{n,6!}];lst
Select[Prime[Range[1000]],PrimeQ[4 # - 3]&] (* Vincenzo Librandi, Feb 03 2014 *)

A157976 Primes p such that 18*p + 17 is also prime.

Original entry on oeis.org

2, 3, 5, 13, 19, 23, 37, 47, 53, 67, 79, 83, 89, 103, 109, 149, 157, 167, 193, 229, 233, 257, 263, 277, 313, 347, 349, 383, 389, 419, 439, 457, 467, 487, 499, 523, 563, 569, 593, 599, 619, 677, 719, 727, 769, 773, 823, 829, 857, 863, 877, 937, 1013, 1039, 1049

Offset: 1

Vladimir Joseph Stephan Orlovsky, Mar 10 2009

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Cf. A136082, A136083, A023213, A023221, A023235, A023240, A157974, A136083, A136084, A136085, A136086, A136087, A089440, A157975.

[n: n in [0..1100] | IsPrime(n) and IsPrime(18*n + 17)]; // Vincenzo Librandi, Feb 03 2014

q=17;lst={};Do[p=Prime[n];If[PrimeQ[(q+1)*p+q],AppendTo[lst,p]],{n,6!}];lst
Select[Prime[Range[1000]], PrimeQ[18 # + 17]&] (* Vincenzo Librandi, Feb 03 2014 *)

A157977 Primes p such that 20*p + 19 is also prime.

Original entry on oeis.org

2, 3, 11, 17, 23, 29, 41, 71, 101, 149, 167, 233, 239, 251, 263, 269, 281, 293, 317, 347, 353, 401, 449, 461, 491, 503, 557, 563, 569, 647, 683, 743, 797, 857, 941, 947, 953, 977, 1019, 1031, 1091, 1103, 1151, 1163, 1193, 1217, 1283, 1289, 1319, 1361, 1373

Offset: 1

Vladimir Joseph Stephan Orlovsky, Mar 10 2009

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

Cf. A136082, A136083, A023213, A023221, A023235, A023240, A157974, A136083, A136084, A136085, A136086, A136087, A089440, A157975, A157976.

[n: n in [0..2000] | IsPrime(n) and IsPrime(20*n + 19)]; // Vincenzo Librandi, Feb 03 2014

q=19;lst={};Do[p=Prime[n];If[PrimeQ[(q+1)*p+q],AppendTo[lst,p]],{n,6!}];lst
Select[Prime[Range[250]],PrimeQ[20#+19]&] (* Harvey P. Dale, Jul 04 2011 *)

cp's OEIS Frontend

A157975 Primes p such that 16*p + 15 is also prime.

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Magma

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A157978 Primes p such that 4*p - 3 is also a prime.

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Magma

Mathematica

A157976 Primes p such that 18*p + 17 is also prime.

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Author

Keywords

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Programs

Magma

Mathematica

A157977 Primes p such that 20*p + 19 is also prime.

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Author

Keywords

Links

Crossrefs

Programs

Magma

Mathematica