Some New Questions about Sequences of Semi-Prime and Prime Numbers
Some New Questions about Sequences of Semi-Prime and Prime Numbers

Summary/Abstract: Everywhere in Nature and life, prime numbers are used very often: cicadas build their life cycles on them, watchmakers use them to calculate ticks, and in aircraft engines with their help the frequency of air pulses is balanced. However, all these areas of application fade against the backdrop of a fact familiar to every cryptographer: prime numbers are in the very heart of modern computer security, that is, they are directly responsible for protecting everything. If you see the lock in the address bar of the browser, it means that a two-key “handshake” is used, based on primes. And our credit cards are also protected using cryptography based on primes. During many years prime numbers pull the attention of many mathematicians in the world. There is a number of well-known open questions concerning prime and semi-prime numbers. In this paper, some statements are proposed and new open questions are presented concerning sequences of semi-prime and prime numbers.

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