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2. List of prime numbers - Wikipedia

   en.wikipedia.org/wiki/List_of_prime_numbers

   Primes that are not the sum of a smaller prime and twice the square of a nonzero integer. 2, 3, 17, 137, 227, 977, 1187, 1493 (OEIS: A042978) As of 2011, these are the only known Stern primes, and possibly the only existing.

3. Permutable prime - Wikipedia

   en.wikipedia.org/wiki/Permutable_prime

   All permutable primes of two or more digits are composed from the digits 1, 3, 7, 9, because no prime number except 2 is even, and no prime number besides 5 is divisible by 5. It is proven [ 4 ] that no permutable prime exists which contains three different of the four digits 1, 3, 7, 9, as well as that there exists no permutable prime composed ...

4. Table of prime factors - Wikipedia

   en.wikipedia.org/wiki/Table_of_prime_factors

   Download QR code; Wikidata item; Print/export ... An odd number does not have the prime factor 2. The first: 1, 3, 5, 7, 9, 11, 13 ... List of prime numbers – List ...

5. Largest known prime number - Wikipedia

   en.wikipedia.org/wiki/Largest_known_prime_number

   Largest known prime number. The largest known prime number is 282,589,933 − 1, a number which has 24,862,048 digits when written in base 10. It was found via a computer volunteered by Patrick Laroche of the Great Internet Mersenne Prime Search (GIMPS) in 2018. [1]

6. Chen prime - Wikipedia

   en.wikipedia.org/wiki/Chen_prime

   Chen prime. In mathematics, a prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes (also called a semiprime). The even number 2 p + 2 therefore satisfies Chen's theorem. The Chen primes are named after Chen Jingrun, who proved in 1966 that there are infinitely many such primes.

7. Truncatable prime - Wikipedia

   en.wikipedia.org/wiki/Truncatable_prime

   Truncatable prime. In number theory, a left-truncatable prime is a prime number which, in a given base, contains no 0, and if the leading ("left") digit is successively removed, then all resulting numbers are prime. For example, 9137, since 9137, 137, 37 and 7 are all prime. Decimal representation is often assumed and always used in this article.

8. Primes in arithmetic progression - Wikipedia

   en.wikipedia.org/wiki/Primes_in_arithmetic...

   For example, the AP-3 {3, 7, 11} does not qualify, because 5 is also a prime. For an integer k ≥ 3, a CPAP-k is k consecutive primes in arithmetic progression. It is conjectured there are arbitrarily long CPAP's. This would imply infinitely many CPAP-k for all k. The middle prime in a CPAP-3 is called a balanced prime.

9. Dihedral prime - Wikipedia

   en.wikipedia.org/wiki/Dihedral_prime

   A dihedral prime or dihedral calculator prime is a prime number that still reads like itself or another prime number when read in a seven-segment display, regardless of orientation (normally or upside down), and surface (actual display or reflection on a mirror). The first few decimal dihedral primes are. 2, 5, 11, 101, 181, 1181, 1811, 18181 ...