40973

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 10x + 3.at n=13A023328
• 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 31.at n=5A031619
• Primes p such that p^2 is the concatenation of two k-digit primes where k is half the length of p^2.at n=32A248046
• Primes p such that (q*s-p*r)/2 and |p*s-q*r|/2 are both prime, where p,q,r,s are consecutive primes.at n=43A341802
• Numbers that start a product crescendo of record length.at n=8A344488
• Prime numbersat n=4290