A033247 Primes of form x^2+73*y^2.

73, 89, 109, 137, 173, 269, 293, 317, 373, 397, 461, 557, 653, 661, 673, 733, 757, 821, 853, 857, 1021, 1097, 1193, 1217, 1229, 1249, 1289, 1381, 1609, 1697, 1861, 1889, 1973, 2081, 2129, 2141, 2309

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

References

• David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989.

Links

• Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]
• N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Programs

Mathematica

QuadPrimes2[1, 0, 73, 10000] (* see A106856 *)