30

This number is a composite.

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

+ The only composite number n such that n^(n+2)+1 is a non-titanic prime, i.e., 30^32+1= 185302018885184100000000000000000000000000000001 (48-digits) is prime. [Loungrides]

+ The smallest sphenic number whose prime factors form a prime-digit prime, i.e., 523. [Loungrides]

+ The smallest sphenic number, 2*3*5, that can also be represented as sum of two consecutive emirps, i.e., 13+17, is also an oblong number, i.e., 5*6. [Loungrides]

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