Global Information Lookup Global Information

Emirp information


An emirp (prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed.[1] This definition excludes the related palindromic primes. The term reversible prime is used to mean the same as emirp, but may also, ambiguously, include the palindromic primes.

The sequence of emirps begins 13, 17, 31, 37, 71, 73, 79, 97, 107, 113, 149, 157, 167, 179, 199, 311, 337, 347, 359, 389, 701, 709, 733, 739, 743, 751, 761, 769, 907, 937, 941, 953, 967, 971, 983, 991, ... (sequence A006567 in the OEIS).[1]

The difference in all pairs of emirps is always a multiple of 18.

All non-palindromic permutable primes are emirps.

It is an open problem whether there are infinitely many emirps.

  1. ^ a b Weisstein, Eric W. "Emirp". MathWorld.

and 7 Related for: Emirp information

Request time (Page generated in 0.5499 seconds.)

Emirp

Last Update:

An emirp (prime spelled backwards) is a prime number that results in a different prime when its decimal digits are reversed. This definition excludes...

Word Count : 133

Mersenne prime

Last Update:

theory) Good Super Higgs Highly cototient Unique Base-dependent Palindromic Emirp Repunit (10n − 1)/9 Permutable Circular Truncatable Minimal Delicate Primeval...

Word Count : 6317

Fermat number

Last Update:

theory) Good Super Higgs Highly cototient Unique Base-dependent Palindromic Emirp Repunit (10n − 1)/9 Permutable Circular Truncatable Minimal Delicate Primeval...

Word Count : 4579

List of prime numbers

Last Update:

become a different prime when their decimal digits are reversed. The name "emirp" is the reverse of the word "prime". 13, 17, 31, 37, 71, 73, 79, 97, 107...

Word Count : 5782

Pythagorean prime

Last Update:

theory) Good Super Higgs Highly cototient Unique Base-dependent Palindromic Emirp Repunit (10n − 1)/9 Permutable Circular Truncatable Minimal Delicate Primeval...

Word Count : 1092

3511

Last Update:

following 3510 and preceding 3512. 3511 is a prime number, and is also an emirp: a different prime when its digits are reversed. 3511 is a Wieferich prime...

Word Count : 206

Double Mersenne number

Last Update:

theory) Good Super Higgs Highly cototient Unique Base-dependent Palindromic Emirp Repunit (10n − 1)/9 Permutable Circular Truncatable Minimal Delicate Primeval...

Word Count : 946

PDF Search Engine © AllGlobal.net