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A295975 Odd primes p with the property that gcd(ord_p q: prime q divides p-1) = 1. 2
31, 307, 601, 1093, 1171, 1723, 2281, 3541, 4423, 6163, 8011, 8317, 10303, 13399, 13421, 17293, 17851, 19183, 20333, 22651, 26317, 28057, 28393, 30103, 30941, 55117, 72931, 73471, 74209, 78233, 83077, 86143, 112643, 121453, 124123, 136453, 142159, 147073, 152041, 174763, 184417, 185821, 186049, 192611 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..253

Seva, Posting on mathoverflow.net, October 29 2014.

MAPLE

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

CROSSREFS

Cf. A292285.

Sequence in context: A000500 A141912 A147297 * A002225 A124335 A042870

Adjacent sequences:  A295972 A295973 A295974 * A295976 A295977 A295978

KEYWORD

nonn

AUTHOR

Jeffrey Shallit, Dec 01 2017

EXTENSIONS

a(33)..a(44) from Robert Israel, Dec 02 2017

STATUS

approved

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Last modified February 22 02:00 EST 2019. Contains 320381 sequences. (Running on oeis4.)