A064966 Numbers n such that 10000000n+1, 10000000n+3, 10000000n+7, 10000000n+9 are all primes.

12022, 15298, 44413, 61507, 72199, 87463, 96538, 108862, 112129, 117694, 122176, 125716, 175078, 185746, 201493, 227221, 250414, 267844, 273460, 371194, 387028, 391765, 397066, 397792, 454921, 581365, 601177, 621010, 642199, 659788, 677206

Offset

1,1

Links

Table of n, a(n) for n=1..31.

Mathematica

Select[Range[10^6/2], PrimeQ[10^7# + 1] && PrimeQ[10^7# + 3] && PrimeQ[10^7# + 7] && PrimeQ[10^7# + 9] &]
Select[Range[678000], AllTrue[# 10^7+{1, 3, 7, 9}, PrimeQ]&] (* Harvey P. Dale, Nov 13 2022 *)

Crossrefs

Cf. A007811 and A064687.

Sequence in context: A183059 A287046 A235308 * A292815 A252304 A251680

Adjacent sequences: A064963 A064964 A064965 * A064967 A064968 A064969

Keyword

nonn

Author

Robert G. Wilson v, Oct 29 2001

Status

approved