66449

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of the function f(x) = 9x + 8.at n=21A023326
• Primes whose digits are composite; primes having only {4, 6, 8, 9} as digits.at n=40A051416
• Numbers that are primes and remain prime for four successive applications of incrementing each digit by 2 with carries ignored.at n=4A088788
• Primes having only {4, 6, 9} as digits.at n=19A107666
• Primes p such that 42*p-1, 42*p+1 and 48*p-1, 48*p+1 are twin primes.at n=15A138697
• The Szeged index of a benzenoid consisting of a linear chain of n hexagons.at n=15A245830
• Numbers k such that A073734(k) is neither squarefree nor a prime power.at n=37A365899
• Prime numbersat n=6625