257 (the 55th prime)
HOME
Primes from 1 to 10000
Primes from 10k to 100k
List of primes by type
Next prime
263
Previous prime
251
Octal
(401)
_{8}
Hexadecimal
(101)
_{16}
Prime gap
6
31st
Sexy prime
(the small number)
The big number is
263
.
25th
Prime of the Form 4n+1
1
^{2}
+ 16
^{2}
4th
Fermat prime
2
^{23}
+ 1
HOME
Primes from 1 to 10000
Primes from 10k to 100k
List of primes by type