27653

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 71.at n=26A020410
• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 23.at n=32A051964
• Least prime in A031938 (lesser of primes differing by 20) whose distance to the next 20-twin is 6*n.at n=25A052359
• Primes p such that p-5 == 0 (mod phi(p-5)).at n=35A067557
• Balanced primes of order seven.at n=24A096699
• Prime Friedman numbers.at n=17A112419
• Primes of the form 2n^3+5.at n=6A201109
• Primes of the form 3n^2 + 5.at n=25A201478
• Increasing sequence of primes p such that all of 2,3,5,...,prime(n) are primitive roots mod p.at n=8A213052
• Primes having primitive roots 2, 3, 5, 7, 11, and 13.at n=23A241047
• Primes having primitive roots 2, 3, 5, 7, 11, 13, and 17.at n=9A241048
• Table read by rows: each row represents the constant and exponent of a Colbert number.at n=6A258074
• Number of distinct circles that can be constructed from an n x n square grid of points using only a compass.at n=15A359931
• Prime numbersat n=3017