23131

Properties

Appears in sequences

• Primes p such that p+1 is palindromic.at n=36A028981
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 96 ones.at n=18A031864
• Primes such that the sum of the factorials of the digits is a perfect square.at n=41A052279
• Primes that are a concatenation of 2, 3 and a prime.at n=7A101218
• Smallest prime p with at least two non-overlapping occurrences of n in decimal representation of p.at n=30A103611
• When convolved with itself and doubled, gives the sequence A000609.at n=5A116986
• Home primes whose homeliness is greater than 3.at n=35A133961
• Home primes whose homeliness is 4.at n=24A133962
• Primes p such that 5*p+2, 7*p+4 and 11*p+6 are also prime.at n=26A173880
• Primes p of the form m^2 + 27.at n=21A227622
• Primes whose digits add to 10 and which have a 3 in the tens place.at n=12A227825
• Primes p such that f(f(p)) is prime, where f(x) = x^4 + x^3 + x^2 + x + 1 = A053699(x).at n=24A237445
• Zeroless numbers k such that k - (sum of digits of k) and k - (product of digits of k) contain the same distinct digits as k.at n=4A248717
• Partial sums of A246031.at n=18A255364
• Primes that can be generated by the concatenation in base 4, in ascending order, of two consecutive integers read in base 10.at n=18A287302
• Prime time primes (of the form HMMSS with primes H < 24 and MM, SS < 60) such that the corresponding number of seconds after midnight is also prime.at n=20A295000
• Primes which, when added to their reversals, produce palindromic primes.at n=27A342681
• Primes of the form A321513(k) + 1 for some k > 0.at n=32A352966
• Prime numbersat n=2582