A142023 -id:A142023 - cp's OEIS frontend

A142027 Primes congruent to 23 mod 31.

23, 271, 457, 643, 829, 953, 1201, 1511, 1697, 1759, 2069, 2131, 2441, 2503, 2689, 2999, 3061, 3371, 3433, 3557, 3929, 4177, 4363, 4549, 4673, 5107, 5231, 5417, 5479, 5851, 6037, 6719, 6781, 6967, 7649, 8269, 8641, 8951, 9013, 9137, 9199, 9323, 10067, 10253

Offset: 1

N. J. A. Sloane, Jul 11 2008

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Cf. A000040, A142005, A142006, A142023.

[p: p in PrimesUpTo(12000) | p mod 31 eq 23 ]; // Vincenzo Librandi, Aug 17 2012

Select[Range[23,20000,31],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 30 2011 *)
Select[Prime[Range[1300]],Mod[#,31]==23&] (* Harvey P. Dale, Sep 05 2023 *)

is(n)=isprime(n) && n%31==23 \\ Charles R Greathouse IV, Jul 02 2016

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 02 2016

A142024 Primes congruent to 20 mod 31.

Original entry on oeis.org

113, 547, 733, 857, 919, 1229, 1291, 1601, 1663, 1787, 1973, 2221, 2531, 2593, 2903, 3089, 3461, 3709, 3833, 4019, 4391, 4639, 5011, 5197, 5507, 5569, 5693, 5879, 6871, 7057, 7243, 8111, 8297, 8669, 8731, 9041, 9103, 9227, 9413, 9661, 10343, 10529, 11087

Offset: 1

N. J. A. Sloane, Jul 11 2008

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Cf. A000040, A142005, A142006, A142023.

[p: p in PrimesUpTo(12000) | p mod 31 eq 20 ]; // Vincenzo Librandi, Aug 17 2012

Select[Range[20,20000,31],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 30 2011 *)
Select[Prime[Range[1400]],Mod[#,31]==20&] (* Harvey P. Dale, Jul 30 2020 *)

is(n)=isprime(n) && n%31==20 \\ Charles R Greathouse IV, Jul 03 2016

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 03 2016

A142025 Primes congruent to 21 mod 31.

Original entry on oeis.org

83, 269, 331, 641, 827, 1013, 1447, 1571, 2129, 2377, 2687, 2749, 3121, 3307, 3617, 3803, 3989, 4051, 4423, 4547, 4733, 4919, 5167, 5477, 5849, 6221, 6469, 6779, 6841, 7027, 7151, 7213, 7523, 8081, 8329, 8887, 9011, 9631, 9817, 9941, 10313, 10499, 11057, 11119

Offset: 1

N. J. A. Sloane, Jul 11 2008

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Cf. A000040, A142005, A142006, A142023.

[p: p in PrimesUpTo(12000) | p mod 31 eq 21 ]; // Vincenzo Librandi, Aug 17 2012

Select[Range[21,20000,31],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 30 2011 *)
Select[Prime[Range[1500]],Mod[#,31]==21&] (* Harvey P. Dale, Aug 20 2024 *)

is(n)=isprime(n) && n%31==21 \\ Charles R Greathouse IV, Jul 03 2016

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 03 2016

A142026 Primes congruent to 22 mod 31.

Original entry on oeis.org

53, 239, 487, 673, 797, 859, 983, 1231, 1789, 1913, 2099, 2161, 2347, 2657, 2719, 2843, 3463, 4021, 4517, 4703, 4889, 4951, 5261, 5323, 5881, 6067, 6563, 6997, 7121, 7307, 7369, 7741, 7927, 8237, 8423, 8609, 9043, 9539, 9601, 9787, 9973, 10159, 10531, 10903

Offset: 1

N. J. A. Sloane, Jul 11 2008

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Cf. A000040, A142005, A142006, A142023.

[p: p in PrimesUpTo(12000) | p mod 31 eq 22 ]; // Vincenzo Librandi, Aug 17 2012

Select[Range[22,20000,31],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 30 2011 *)

is(n)=isprime(n) && n%31==22 \\ Charles R Greathouse IV, Jul 03 2016

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 03 2016

cp's OEIS Frontend

A142027 Primes congruent to 23 mod 31.

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A142024 Primes congruent to 20 mod 31.

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A142025 Primes congruent to 21 mod 31.

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A142026 Primes congruent to 22 mod 31.

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