isKnownPrime static method
Returns true
if n
is in the knownPrimes list.
Implementation
static bool? isKnownPrime(int n) {
assert(_knownPrimes.isNotEmpty, '`_knownPrimes` must never be empty.');
if (n > _knownPrimes.last) {
return null;
}
var idx = _knownPrimes.binarySearch(n, (a, b) => a.compareTo(b));
return idx >= 0;
}