23041

Properties

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 98 ones.at n=23A031866
• Initial terms of '4-block' primes as described in A032591.at n=34A032592
• Smallest k for which k, 2k, ... n*k all contain the digit 2.at n=10A039933
• Smallest k for which k, 2k, ... n*k all contain the digit 2.at n=12A039933
• Smallest k for which k, 2k, ... n*k all contain the digit 2.at n=11A039933
• Smallest k for which k, 2k, ... n*k all contain the digit 2.at n=13A039933
• a(n) = T(n,n), array T given by A048472.at n=9A048482
• Least prime in A031930 (lesser of 12-twins) whose distance to the next 12-twin is 2*n.at n=17A052355
• Concatenation of n in base 2 up to base 10 and n in base 10 down to base 2 is prime, all numbers are interpreted as decimals.at n=6A054258
• Primes p such that x^36 = 2 has no solution mod p, but x^12 = 2 has a solution mod p.at n=31A059668
• Primes p such that the greatest prime divisor of p-1 is 5.at n=42A061599
• Primes whose digits can be arranged in increasing cyclic order - to form a substring of 123456789012345678901234567890...at n=36A068710
• Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3.at n=25A074709
• Base 4 expansion of 1/n has equal percentage of each digit 0,1,2,3 (primitive values of n only).at n=22A074900
• Primes of the form 512*k+1.at n=9A076339
• Smallest prime which is 1 more than the product of n distinct composite numbers.at n=5A081545
• Primes resulting from serial multiplication of even composites, plus 1.at n=2A093154
• Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = -2 is solvable.at n=4A102267
• Elite primes: a prime number p is called elite if only a finite number of Fermat numbers 2^(2^n)+1 are quadratic residues mod p.at n=5A102742
• Primes of the form 1024n + 513.at n=4A105132