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

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

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 A368953

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