TypePostAuthorRepliesLast post
Open problemSum of prime and semiprime conjecture princeps25 years 25 weeks ago
Open problemAlexa's Conjecture on Primality princeps78 years 31 weeks ago
Open problem3 is a primitive root modulo primes of the form 16 q^4 + 1, where q>3 is prime princeps19 years 21 weeks ago
Open problemGiuga's Conjecture on Primality princeps09 years 43 weeks ago