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Search: a248368 -id:a248368
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Numbers m such that both p = 52*m + 1 and q = 52*p + 1 are prime.
+10
1
36, 39, 60, 126, 171, 189, 195, 300, 315, 405, 420, 435, 504, 540, 570, 606, 720, 756, 816, 876, 960, 1089, 1221, 1224, 1260, 1329, 1365, 1371, 1389, 1404, 1530, 1554, 1674, 1740, 1785, 1791, 1914, 1959, 2085, 2244, 2304, 2334, 2376, 2451, 2454, 2520, 2631, 2646, 2715, 2799, 2976
OFFSET
1,1
COMMENTS
All terms are divisible by 3, because if m == 1 or 2 (mod 3), either q or p is divisible by 3.
LINKS
MATHEMATICA
s={}; Do[If[PrimeQ[p=52*n+1)]&&PrimeQ[52*p+1], AppendTo[s, n]], {n, 3000}]; s
PROG
(PARI)
for(n=1, 10^4, p=52*n+1; if(isprime(p)&&isprime(52*p+1), print1(n, ", "))) \\ Derek Orr, Oct 06 2014
CROSSREFS
Subsequence of A248221.
KEYWORD
nonn
AUTHOR
Zak Seidov, Oct 05 2014
STATUS
approved

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