A288608 Primes of the form k!6+3, where k!6 is the sextuple factorial number (A085158).
5, 7, 19, 43, 227, 643, 4483, 14083, 116483, 13404163, 333247405883392003, 75494329921353417731638961852391076220895232000003, 607641057683281452422878601758017247375890833361248739064460794062744301780319012095222746705407815771488256000000000000003
Offset: 1
Keywords
Links
- Robert Price, Table of n, a(n) for n = 1..14
- Henri& Renaud Lifchitz, PRP Records.Search for n!6+3.
- Joe McLean, Interesting Sources of Probable Primes
- OpenPFGW Project, Primality Tester
Crossrefs
Cf. A287844.
Programs
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Mathematica
MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 6] + 3, {i, 0, 100}], PrimeQ[#]&]