TypePostAuthorRepliesLast post
Open problemSum of prime and semiprime conjecture princeps27 years 18 weeks ago
Open problemAlexa's Conjecture on Primality princeps710 years 25 weeks ago
Open problem3 is a primitive root modulo primes of the form 16 q^4 + 1, where q>3 is prime princeps111 years 14 weeks ago
Open problemGiuga's Conjecture on Primality princeps011 years 36 weeks ago