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%I #12 Feb 04 2024 01:14:28
%S 3,5,13,19,23,29,31,59,61,71,73,83,89,101,103,139,149,191,199,223,229,
%T 233,269,271,281,293,311,379,383,401,409,433,463,479,503,523,569,601,
%U 631,643,661,691,719,751,761,773,811,829,839,863,883,929,953,1009,1013
%N p and 12*p+1 are both primes.
%H Harvey P. Dale, <a href="/A075704/b075704.txt">Table of n, a(n) for n = 0..1000</a>
%e 5 is a prime and 12*5+1=61 is also a prime. 13 and 12*13+1=157 are both primes...
%p ts_m_sophie_germain_pras := proc(n); if (isprime(n)='true' and isprime(12*n+1)='true') then RETURN(n); fi; end: seq(ts_m_sophie_germain_pras(i), i=1..2030);
%t Select[Prime[Range[300]],PrimeQ[12#+1]&] (* _Harvey P. Dale_, Feb 06 2012 *)
%Y Cf. A005384, A023212, A007693, A023228, A023237.
%K nonn
%O 0,1
%A _Jani Melik_, Oct 02 2002
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