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In the realm of palindromic primes, 11 is the only one with an even number of digits. Every other palindrome having an even number of digits is divisible by 11 and so can’t be prime.

More information: Han-Lin Li et al, The Periodic Table of Primes, SSRN Electronic Journal (2024). DOI: 10.2139/ssrn.4742238 Provided by City University of Hong Kong ...

A celebrated and deep result of Green and Tao states that the primes contain arbitrarily long arithmetic progressions. In this note, I provide a straightforward argument demonstrating that the primes ...