eigenmath/isprime.cpp

56 lines
655 B
C++

#include "stdafx.h"
#include "defs.h"
void
eval_isprime(void)
{
push(cadr(p1));
eval();
p1 = pop();
if (isnonnegativeinteger(p1) && mprime(p1->u.q.a))
push_integer(1);
else
push_integer(0);
}
static char *s[] = {
// 0 and 1 are not prime numbers
"isprime(0)",
"0",
"isprime(1)",
"0",
"isprime(13)",
"1",
"isprime(14)",
"0",
// from the Prime Curios web page
"isprime(9007199254740991)",
"0",
// The largest prime that JavaScript supports
"isprime(2^53 - 111)",
"1",
// misc. primes
"isprime(2^50-71)",
"1",
"isprime(2^40-87)",
"1",
};
void
test_isprime(void)
{
test(__FILE__, s, sizeof s / sizeof (char *));
}