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2351^ 2351 ends with the digits 2351; There are 6907 digits
in 2351! Note that 6907 is prime.
2351 is middle of a sequence of 17 consecutive primes whose sum is also prime: 2293 + 2297 + ... + 2351 + ... + 2393 + 2399 = 39971 is prime, and 17 is prime. 2351 is a prime of the form p^4  p^2  p^0, where p=7 is prime. 2351 when written in base 6 is a twin prime: 2*6^3 + 3*6^2 + 5*6 + 1 = 571 and 569,571 are twin primes. 2351 is the smallest prime factor of the Mersenne number 2^471; 2351 is the sum of all 3digit Fibonacci numbers. 2351 is the smallest prime that is the sum of all ndigit Fibonacci numbers. 2351^3 = 12994449551, its reversal, 15594449921, is prime; 2351^4 = 30549950894401, its reversal, 10449805994503, is prime. [Noll] Twentythree fiftyone (23:51) is the largest prime on a 24hour clock, in hours and minutes, that is also prime when displayed on a 12hour clock (11:51) [Homewood]
(There is one curio for this number that has not yet been approved by an editor.)
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