TypePostAuthorRepliesLast post
Open problemSum of prime and semiprime conjecture princeps24 years 29 weeks ago
Open problemAlexa's Conjecture on Primality princeps77 years 36 weeks ago
Open problem3 is a primitive root modulo primes of the form 16 q^4 + 1, where q>3 is prime princeps18 years 26 weeks ago
Open problemGiuga's Conjecture on Primality princeps08 years 48 weeks ago