isPrimen

Isprimen is a term that appears in some programming contexts as a predicate used to determine whether a given integer is prime. It is not a standard mathematical function; more widely used names include is_prime and isPrime. Because isprimen is encountered primarily in individual codebases or informal discussions, its exact semantics can vary between projects, languages, and author preferences.

In typical usage, an isprimen-like function or method takes one argument n and returns a boolean indicating primality. By convention, values less than 2 are treated as non-prime, 2 is prime, and so on. Some implementations return true/false, others return 1/0, and some may raise errors if the input is not an integer. Documentation usually specifies behavior for negative inputs and non-integer types.

Implementation strategies for isprimen range from straightforward trial division up to sqrt(n) with simple optimizations, to more sophisticated tests such as Miller–Rabin for large inputs or the Agrawal–Kayal–Saxena (AKS) primality test for theoretical completeness. The choice of algorithm is orthogonal to the function name and may reflect performance requirements or language constraints.

As a term, isprimen is not widely standardized in mathematics or computer science literature. If encountered in code, it is advisable to consult the project’s API documentation to understand the expected input types, return values, and edge-case handling. In most contexts, developers refactor such names to conventional forms like isPrime or primeTest to improve clarity.