Name: tb29552 Date: 05/24/2001


/* Integer versus Long

In class java.math.BigInteger the private attribute
"SMALL_PRIME_PRODUCT" is initialized to
3*5*7*11*13*17*19*23*29*31*37*41 which is interpreted as integer
multiplication, leading to a value of 1685106581 which of course
is wrong (much too less)!

A simple "L" behind the 3 (for example) would make the compiler
interpreting the expression as long, leading to the correct value
of 152125131763605.

This bug makes the method "smallPrime()" reject a lot of primes
in its simple prime test which are in fact correct primes. This
makes the construction of prime big integers much slower!

The following code illustrates the bug:
System.out.println(BigInteger.valueOf(3*5*7*11*13*17*19*23*29*31*37*41));

Code working correctly (added "L" behind 3):
System.out.println(BigInteger.valueOf(3L*5*7*11*13*17*19*23*29*31*37*41));

 */

public class IVL {
    public static void main(String[] args) {

        //The following code reproduces the bug:
        System.out.println
            (java.math.BigInteger.valueOf
             (3 * 5 * 7 * 11 * 13 * 17 * 19 * 23 * 29 * 31 * 37 * 41));

        //Code working correctly (added "L" behind 3):
        System.out.println
            (java.math.BigInteger.valueOf
             (3L * 5 * 7 * 11 * 13 * 17 * 19 * 23 * 29 * 31 * 37 * 41));
    }
}

(Review ID: 124943)
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