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A295975 Odd primes p with the property that gcd(ord_p q: prime q divides p-1) = 1. 2

%I

%S 31,307,601,1093,1171,1723,2281,3541,4423,6163,8011,8317,10303,13399,

%T 13421,17293,17851,19183,20333,22651,26317,28057,28393,30103,30941,

%U 55117,72931,73471,74209,78233,83077,86143,112643,121453,124123,136453,142159,147073,152041,174763,184417,185821,186049,192611

%N Odd primes p with the property that gcd(ord_p q: prime q divides p-1) = 1.

%H Robert Israel, <a href="/A295975/b295975.txt">Table of n, a(n) for n = 1..253</a>

%H Seva, <a href="https://mathoverflow.net/questions/185683/why-gcd-rm-ord-pq-colon-q-mid-p-1-likes-to-be-large">Posting on mathoverflow.net</a>, October 29 2014.

%p select(p -> isprime(p) and igcd(op(map(numtheory:-order, numtheory:-factorset(p-1),p)))=1, [seq(i,i=3..3*10^5,2)]); # _Robert Israel_, Dec 02 2017

%Y Cf. A292285.

%K nonn

%O 1,1

%A _Jeffrey Shallit_, Dec 01 2017

%E a(33)..a(44) from _Robert Israel_, Dec 02 2017

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)