Wiki User
∙ 10y ago47 + 74 = 121
Wiki User
∙ 10y agoThe number is 23.
As of 2013, 17,425,170 digits.
The answer is 1. The smallest prime is 2 and the greatest prime (of however many digits) must be odd. The remainder of ANY odd number when divided by 2 must be 1.
Prime numbers that are still prime after their digits are reversed, like (13,31)(17,71)(37,73)(79,97)(107,701)(113,311)
one is 17 and 71, another one is 11,
A prime number with identical digits is 11.
Mirror primes are pairs of prime numbers whose digits are reversed. (13,31)(17,71)(37,73)(79,97)
Some of them are: 11 13 17 37 and 79
The number 11 is prime and has two identical digits.
13,31 17,71 37,73 79,97
There is no greatest prime number.
8243 is a prime number, but there is no greatest prime number.