cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A244778 Prime numbers ending in the prime number 97.

Original entry on oeis.org

97, 197, 397, 797, 997, 1097, 1297, 1597, 1697, 1997, 2297, 2797, 2897, 3697, 3797, 4297, 4397, 4597, 5197, 5297, 5897, 6197, 6397, 6997, 7297, 8297, 8597, 9397, 9497, 9697, 10597, 11197, 11497, 11597, 11897, 12097, 12197, 12497, 12697, 13297, 13397
Offset: 1

Views

Author

Vincenzo Librandi, Jul 07 2014

Keywords

Comments

Also primes of the form 100*n+97. Subsequence of A141886, A141944.

Crossrefs

Cf. similar sequences listed in A244763.

Programs

  • Magma
    [n: n in PrimesUpTo(15000) | n mod 100 eq 97];
    
  • Mathematica
    Select[Prime[Range[5, 6000]], Take[IntegerDigits[#], -2]=={9, 7} &]
  • PARI
    select(x->(x % 100)==97, primes(2000)) \\ Michel Marcus, Jul 07 2014

A275317 Prime numbers of the form 100*n+57.

Original entry on oeis.org

157, 257, 457, 557, 757, 857, 1657, 2357, 2557, 2657, 2857, 2957, 3257, 3457, 3557, 4057, 4157, 4357, 4457, 4657, 4957, 5557, 5657, 5857, 6257, 6857, 7057, 7457, 7757, 9157, 9257, 9857, 10357, 10457, 10657, 10957, 11057, 11257, 11657, 12157, 12457, 12757
Offset: 1

Views

Author

G. L. Honaker, Jr., Jul 23 2016

Keywords

Comments

Also primes ending with 57.

Crossrefs

Cf. A000040.
Cf. similar sequences listed in A244763.

Programs

  • Magma
    [n: n in PrimesUpTo(14000) | n mod 100 eq 57]; // Vincenzo Librandi, Jul 23 2016
  • Mathematica
    Select[Prime[Range[5, 2000]], Take[IntegerDigits[#], -2] == {5, 7} &] (* Vincenzo Librandi, Jul 23 2016 *)
    Select[100*Range[0,150]+57,PrimeQ] (* Harvey P. Dale, Apr 03 2024 *)

Extensions

More terms from Vincenzo Librandi, Jul 23 2016
Previous Showing 21-22 of 22 results.