A064979 - OEIS

%I #2 Mar 30 2012 17:30:36

%S 7190,7256,7991,15398,16406,20549,21011,24368,51794,68426,71762,73574,

%T 77792,80939,84995,98291,102488,112250,139595,160193,163931,164081,

%U 164981,167360,167585,170168,193040,220676,226136,227942,245624,246383

%N n*10^5-1, n*10^5-3, n*10^5-7 and n*10^5-9 are all prime.

%t Select[ Range[3 10^5], PrimeQ[10^5# - 1] && PrimeQ[10^5# - 3] && PrimeQ[10^5# - 7] && PrimeQ[10^5# - 9] &]

%K easy,nonn

%O 1,1

%A _Robert G. Wilson v_, Oct 30 2001