This number is a prime.

Just showing those entries submitted by 'Post': (Click here to show all)

+ The largest prime of the form |a^b - c^d|, where a, b, c and d are the first 4 primes. 311 = 7^3 - 2^5. Curiously, 311 = prime(2^6). [Post]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell