A105854 Primes of the form 20*k + 3.

3, 23, 43, 83, 103, 163, 223, 263, 283, 383, 443, 463, 503, 523, 563, 643, 683, 743, 823, 863, 883, 983, 1063, 1103, 1123, 1163, 1223, 1283, 1303, 1423, 1483, 1523, 1543, 1583, 1663, 1723, 1783, 1823, 2003, 2063, 2083, 2143, 2203, 2243, 2383, 2423, 2503, 2543

Offset: 1

Author

Zak Seidov, May 05 2005

Keywords

• nonn
• easy

Comments

Cf. A030431: Primes of the form 10*k + 3.

Links

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

Crossrefs

Cf. A000040, A030431.

Programs

Magma

[n: n in PrimesUpTo(2600) | IsDivisibleBy(n-3,20)];  // Bruno Berselli, Apr 05 2011

Magma

[ a: n in [0..250] | IsPrime(a) where a is 20*n+3 ]; // Vincenzo Librandi, Apr 06 2011

Mathematica

Select[Range[3, 2003, 20], PrimeQ[ # ]&]

Extensions

More terms from N. J. A. Sloane, Jul 11 2008