160001

Properties

Appears in sequences

• A sequence of sorted odd primes 3 = p_1 < p_2 < ... < p_m such that p_i-2 divides the product p_1*p_2*...*p_(i-1) of the earlier primes and each prime factor of p_i-1 is a prime factor of twice the product.at n=20A001259
• a(n) = n^4 + 1.at n=20A002523
• Primes of the form k^4 + 1.at n=5A037896
• a(n) = next prime after n^4.at n=19A053786
• Sum of distinct powers of 20; i.e., numbers with digits in {0,1} base 20; i.e., write n in base 2 and read as if written in base 20.at n=17A063012
• Primes p such that sigma(p-1)+sigma(p+1) is prime.at n=13A067464
• Primes of the form 2^r*5^s + 1.at n=18A077497
• Largest prime factor of n^4 + 1.at n=19A096172
• Primes of the form a^5 + b^4 with a>0.at n=15A100274
• Primes associated with A127435.at n=22A127436
• Primes of the form 81n^2 - 90n + 26.at n=6A144571
• Primes of the form A174881(k)+1.at n=2A176245
• Primes dividing repunits R(10^n) for some n.at n=40A178070
• Primes having only {0, 1, 6} as digits.at n=33A199326
• Primitive prime factors of the cyclotomic polynomial sequence Phi(8,k) in the order in which they occur.at n=22A256145
• a(n) = 1 + sigma(n)^4.at n=18A259308
• Primes of the form: 1 + sigma(n)^4.at n=6A259310
• Primes p such that gcd(phi(p-1), sigma(p-1)) = 1 with phi = A000010, sigma = A000203.at n=37A270539
• Prime factors (counting multiplicity) of 10^10^10^10^2 - 1.at n=42A278835
• Semi-octavan primes: primes of the form x^4 + y^8.at n=18A291206