Twin primes | (p, p + 2) are both prime. |
Prime triplets | (p, p + 2, p + 6) or (p, p + 4, p + 6) are all prime. |
Prime quadruplets | (p, p + 2, p + 6, p + 8) are all prime. |
Cousin primes | (p, p + 4) are both prime. |
Sexy primes | (p, p + 6) are both prime. |
Form 3n+1 | Of the form . |
Form 4n+1 | Of the form . |
Form 4n+3 | Of the form . |
Emirp | Reversible primes |
Euler prime numbers | Of the form . |
Mersenne primes | Of the form . |
Euclid primes | Of the form . |
Primorial primes | Of the form . |
Fermat primes | Of the form . |
Factorial primes | Of the form n! − 1 or n! + 1 . |
Double factorial primes | Of the form n!! − 1 or n!! + 1 . |
Sophie Germain primes | p and 2p + 1 are both prime . |
Safe primes | p and (p - 1) / 2 are both prime . |
Left-truncatable primes | |
Right-truncatable primes | |
Two-sided primes | |
Wilson primes | p2 divides (p − 1)! + 1 . |
Super primes | p-th prime |
Odd primes | Of the form . |