Authors: Marius Coman
In this paper I present the observation that the formula p^2 – q^2 + 1, where p and q are primes with the special property that the sums of their digits are equal, leads often to primes (of course, having only the digital root equal to 1 due to the property of p and q to have same digital sum implicitly same digital root) or to special kinds of semiprimes: some of them named by me, in few previous papers, c/m-primes, and some of them named by me, in this paper, g-primes respectively s-primes. Note that I chose the names “g/s-primes” instead “g/s-semiprimes” not to exist confusion with the names “g/s-composites”, which I intend to define and use in further papers.
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[v1] 2015-04-19 19:18:27
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