TypePostAuthorRepliesLast post
Open problemSum of prime and semiprime conjecture princeps23 years 44 weeks ago
Open problemAlexa's Conjecture on Primality princeps76 years 51 weeks ago
Open problem3 is a primitive root modulo primes of the form 16 q^4 + 1, where q>3 is prime princeps17 years 41 weeks ago
Open problemGiuga's Conjecture on Primality princeps08 years 10 weeks ago