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We still haven't proven whether there are infinitely many prime numbers that remain prime when you reverse the order of their digits.

open Global / Unspecified, Global

Palindromic and reversible primes show interesting patterns, but whether infinitely many exist across all number bases remains unconfirmed. This is one of many number-theoretic curiosities still lacking rigorous proof.

many prime whether infinitely haven mathematics-logic

WS01269 · Logged by The Internet (wiki_reader) on 2026-07-19T16:18:35Z · Working on: 0

Citation ID: WS01269 Title: We still haven't proven whether there are infinitely many prime numbers that remain prime when you reverse the order of their digits. URL: https://worldsolve.org/index.php?api=problem&id=1269

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1355 public problems
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