90289

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 35.at n=8A031623
• Primes p such that x^54 = 2 has no solution mod p, but x^18 = 2 has a solution mod p.at n=25A059666
• Primes with 23 as smallest positive primitive root.at n=25A061335
• Primes starting and ending with 9.at n=35A062335
• Primes p such that x^9 = 2 has a solution mod p, but x^(9^2) = 2 has no solution mod p.at n=43A070185
• Beginnings of maximal chains of primes with four members (three links).at n=22A152867
• Canyon primes (A134971) whose first and last digits are 9.at n=28A179673
• Primes (with d digits, say) that generate another prime when acted on by the "standard" superpermutation of length A007489(d) of d elements (cf. comment).at n=43A244311
• Primes that can be generated by the concatenation in base 8, in ascending order, of two consecutive integers read in base 10.at n=31A287310
• Prime numbersat n=8745