5

This number is a prime.

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

+ The smaller in a set of twin primes whose product is the concatenation of two successive primes, i.e., 5*7 = 3~5. Is there another set of twin primes with this property? See PC89107...70827 (36-digits) for a near hit! [Honaker]

+ Fn = 2^(2^n) + 1 are semiprimes for n = 5, 6, 7, and 8. [De Geest and Honaker]

+ Can the sum of the first n Fibonacci primes be a Fibonacci number greater than 5? [Honaker]

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