Emirp Checker
Check whether a prime integer yields a different prime when its digits are reversed.
Description
Check whether a prime integer yields a different prime when its digits are reversed.
Check whether a prime integer yields a different prime when its digits are reversed.
When to use Emirp Checker
Use this tool to test or transform exact integers according to the named number-theory definition, for education, validation, or algorithm checks.
- Integer
- An integer input.
How the calculation works
The formula below determines the tool output. Emirp: Whether emirp is true.1
an emirp is prime and has a different digit reversal that is also prime Limitations and assumptions
This tool applies an exact integer definition within JavaScript's safe-integer range. It is not an arbitrary-precision factorization or proof system, so do not use rounded measurements or integers beyond the accepted domain as though they were exact.
Alternative or Complementary approaches
Complement a number-property result with its factorization, divisors, digit representation, or a second independent predicate. A true result establishes only the named property and does not imply other properties such as primality.
References
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Emirp — Wikipedia contributors
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