Abstract

Let k be a positive integer, and suppose that k = a1a2 … at, where ai is the ith digit of k (reading from left to right). Let d ∈ {0,1,…,9}. For n ≥ 1, defineIn this article, we examine when sn is composite for all n.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.