This number is a prime.
Just showing those entries submitted by 'Silva': (Click here to show all)
|Kristen Eller ©2002|
23 + 2*3, 23 + 2^3, and 23 + 2*3 + 2^3 are the three next primes after 23. [Silva]
The smallest n-digit prime that yields n others if each of its digits is duplicated (223, 233). [Silva]
The smallest prime p that divides the reversal of the next prime after p. The next three pairs of consecutive primes of this form and with this property are: 233 239; 2333 2339; 23333 23339. Are there primes of other forms with this property? [Silva]
The smallest prime p such that neither p+1 nor p-1 is divisible by the sum of the digits of p. [Silva]
23+2 = (2+3)^2. [Silva]