emirp

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• Emirp — An emirp ( prime spelled backwards) is a prime number that results in a different prime when its digits are reversed.MathWorld|title=Emirp|urlname=Emirp] This definition excludes the related palindromic primes. Emirps are also called reversible… …   Wikipedia

• Mirpzahlen — („prim“ rückwärts geschrieben, englisch emirp) sind Primzahlen, die rückwärts gelesen eine andere Primzahl ergeben (also kein Zahlenpalindrom darstellen). Die ersten Mirpzahlen sind 13, 17, 31, 37, 71, 73, 79, 97,  … Im Gegensatz zur Eigenschaft… …   Deutsch Wikipedia

• Mirpzahl — Mirpzahlen („prim“ rückwärts geschrieben, englisch emirp) sind Primzahlen, die rückwärts gelesen eine andere Primzahl ergeben. Die ersten Mirpzahlen sind 13, 17, 31, 37, 71, 73, 79, 97,  … Im Gegensatz zur Eigenschaft Primzahl hängt die… …   Deutsch Wikipedia

• Reimerp — Un reimerp (premier épelé à l envers) est un nombre premier qui donne un nombre premier différent lorsqu on inverse l ordre de ses chiffres en base dix[1]. Cette définition exclut donc les nombres premiers palindromes. Les premiers reimerps sont… …   Wikipédia en Français

• Mersenne prime — Named after Marin Mersenne Publication year 1536[1] Author of publication Regius, H. Number of known terms 47 Conjectured number of terms Infinite …   Wikipedia

• Cullen number — In mathematics, a Cullen number is a natural number of the form n · 2n + 1 (written Cn). Cullen numbers were first studied by Fr. James Cullen in 1905. Cullen numbers are special cases of Proth numbers. Properties In 1976 Christopher Hooley… …   Wikipedia

• 79 (number) — ← 78 80 → 79 ← 70 71 72 73 74 75 76 77 …   Wikipedia

• 1000 (number) — List of numbers Integers ← 1k 2k 3k 4k 5k 6k 7k 8k 9k → Cardinal 1000 one thousand …   Wikipedia

• Cuban prime — A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. The first of these equations is: and the first few cuban primes from this equation are (sequence A002407 in OEIS): 7 …   Wikipedia

• Double Mersenne number — In mathematics, a double Mersenne number is a Mersenne number of the form where p is a Mersenne prime exponent. Contents 1 The smallest double Mersenne numbers 2 Double Mersenne primes …   Wikipedia

• List of recreational number theory topics — This is a list of recreational number theory topics (see number theory, recreational mathematics). Listing here is not pejorative: many famous topics in number theory have origins in challenging problems posed purely for their own sake. See list… …   Wikipedia