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A064903
Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 5.
1
133, 329, 403, 427, 623, 721, 781, 817, 917, 1079, 1211, 1241, 1417, 1507, 1603, 1799, 1819, 1897, 1991, 2077, 2191, 2231, 2681, 2779, 2923, 2959, 2983, 3073, 3107, 3269, 3443, 3563, 3661, 4121, 4151, 4169, 4249, 4411, 4427, 4709, 4739, 4837, 5033
OFFSET
1,1
LINKS
MATHEMATICA
sp5Q[n_]:=Module[{f=Transpose[FactorInteger[n]][[1]]}, Mod[Last[f], First[ f]] == 5]; Select[Range[5500], PrimeOmega[#]==2&&sp5Q[#]&] (* Harvey P. Dale, Aug 12 2014 *)
CROSSREFS
Cf. A001358 (p2 mod p1 = 0), A064899-A064911.
Sequence in context: A146181 A105984 A115518 * A259638 A070158 A055940
KEYWORD
nonn
AUTHOR
Patrick De Geest, Oct 13 2001
EXTENSIONS
Name clarified by Sean A. Irvine, Jul 31 2023
Offset changed by Andrew Howroyd, Aug 13 2024
STATUS
approved