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Primes p such that p + googol is prime.
2

%I #8 Dec 26 2019 05:05:58

%S 3469,4447,5641,6637,9013,9631,10903,11173,11839,13831,15139,16183,

%T 17581,18793,19819,21523,21673,22027,22189,25759,25771,28123,28933,

%U 30517,33931,34843,37171,42187,42337,42901,46279,47353,48823,49123,55381,57709,59023,61681

%N Primes p such that p + googol is prime.

%H Amiram Eldar, <a href="/A108250/b108250.txt">Table of n, a(n) for n = 1..10000</a>

%F A googol = 10^100.

%t Select[Range[5*10^4],And @@ PrimeQ[{#, 10^100 + #} ] &] (* _Amiram Eldar_, Dec 26 2019 *)

%o (PARI) g(n) = forstep(x=1,n,2,if(isprime(10^100+x)&isprime(x),print1(x",")))

%Y Cf. A108252.

%K easy,nonn

%O 1,1

%A _Cino Hilliard_, Jun 17 2005

%E More terms from _Amiram Eldar_, Dec 26 2019

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Last modified September 19 23:07 EDT 2024. Contains 376015 sequences. (Running on oeis4.)