TypePostAuthorRepliesLast post
Open problemSum of prime and semiprime conjecture princeps24 years 12 weeks ago
Open problemAlexa's Conjecture on Primality princeps77 years 19 weeks ago
Open problem3 is a primitive root modulo primes of the form 16 q^4 + 1, where q>3 is prime princeps18 years 9 weeks ago
Open problemGiuga's Conjecture on Primality princeps08 years 30 weeks ago