18837001

Properties

Appears in sequences

• Smallest primitive factor of 2^(2n+1) + 1.at n=22A002185
• Largest primitive factor of 2^(2n+1) + 1.at n=22A002589
• Cyclotomic polynomials at x=-8.at n=15A020507
• a(n) = n^8 + n^7 - n^5 - n^4 - n^3 + n + 1.at n=8A060894
• Primes which divide none of overpseudoprimes to base 2 (A141232).at n=33A144755
• Aurifeuillian primes of the form 2^k+1.at n=18A153443
• Primes in A153601.at n=28A153602
• Numbers k (between 2^(m-1) and 2^m) such that 2^(k-1) == 1 (mod k) and 2^(k-1-m) == k - 2^p (mod k) for some p > 0 with 2^p < k.at n=36A167612
• Primes p such that the octal expansion of 1/p has a unique period length.at n=6A217611
• Greatest prime factor of n^9+1.at n=31A240552
• Prime divisors of 2^3510-1, listed with multiplicities.at n=39A242715
• Largest prime factor of the n-th Jacobsthal number, A001045(n).at n=42A271314
• Largest prime factor of 8^n + 1.at n=15A274905
• Largest prime factor of 8^n - 1.at n=29A274908
• Prime divisors of 2^720 - 1.at n=29A291360
• Primes of the form Phi(k, -8), where Phi is the cyclotomic polynomial.at n=1A291992
• Primes of the form Phi(k, -2), where Phi is the cyclotomic polynomial.at n=28A292006
• Primes of the form Phi(k, 8), where Phi is the cyclotomic polynomial.at n=3A292012
• Smallest primitive prime factor of 8^n-1.at n=29A379641
• Prime numbersat n=1201328