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  2. List of English palindromic phrases - Wikipedia

    en.wikipedia.org/wiki/List_of_English...

    A palindrome is a word, number, phrase, or other sequence of symbols that reads the same backwards as forwards, such as the sentence: "A man, a plan, a canal – Panama". ". Following is a list of palindromic phrases of two or more words in the English language, found in multiple independent collections of palindromic phra

  3. Palindrome - Wikipedia

    en.wikipedia.org/wiki/Palindrome

    A palindrome is a word, number, phrase, or other sequence of symbols that reads the same backwards as forwards, such as madam or racecar, ...

  4. Palindromic number - Wikipedia

    en.wikipedia.org/wiki/Palindromic_number

    The first nine terms of the sequence 1 2, 11 2, 111 2, 1111 2, ... form the palindromes 1, 121, 12321, 1234321, ... (sequence A002477 in the OEIS) The only known non-palindromic number whose cube is a palindrome is 2201, and it is a conjecture the fourth root of all the palindrome fourth powers are a palindrome with 100000...000001 (10 n + 1).

  5. Longest palindromic substring - Wikipedia

    en.wikipedia.org/wiki/Longest_palindromic_substring

    Since the palindrome at the MirroredCenter is "aba" and extends beyond the boundaries of the "Old" palindrome, we know the longest palindrome at the second "b" can only extend up to the border of the "Old" palindrome. We know this because if the character after the "Old" palindrome had been an "a" instead of a "c", the "Old" palindrome would ...

  6. List of palindromic places - Wikipedia

    en.wikipedia.org/wiki/List_of_palindromic_places

    Because English wordplay generally ignores apostrophes, it is common to ignore ʻokinas in deciding whether a Polynesian name is a palindrome. However, this list does not follow that rule. Unbalanced ʻokinas will not be found in this list. However that rule has not been applied consistently to the Arabic hamza, which also represents a glottal ...

  7. Palindromic prime - Wikipedia

    en.wikipedia.org/wiki/Palindromic_prime

    It is not known if there are infinitely many palindromic primes in base 10. For any base, almost all palindromic numbers are composite, [2] i.e. the ratio between palindromic composites and all palindromes less than n tends to 1. A few decorative examples do however exist; in base 10 the following are primes:

  8. Palindrome tree - Wikipedia

    en.wikipedia.org/wiki/Palindrome_Tree

    In computer science a palindrome tree, also called an EerTree, [1] is a type of search tree, that allows for fast access to all palindromes contained in a string.They can be used to solve the longest palindromic substring, the k-factorization problem [2] (can a given string be divided into exactly k palindromes), palindromic length of a string [3] (what is the minimum number of palindromes ...

  9. Lychrel number - Wikipedia

    en.wikipedia.org/wiki/Lychrel_number

    59 becomes a palindrome after three iterations: 59+95 = 154, 154+451 = 605, 605+506 = 1111; 89 takes an unusually large 24 iterations (the most of any number under 10,000 that is known to resolve into a palindrome) to reach the palindrome 8813200023188. 10,911 reaches the palindrome 4668731596684224866951378664 (28 digits) after 55 steps.