Increase precision for base conversion for large integers.

test/mjsunit/regress/regress-3025.js

Index: test/mjsunit/regress/regress-3025.js
diff --git a/test/mjsunit/regress/regress-2790.js b/test/mjsunit/regress/regress-3025.js
similarity index 92%
copy from test/mjsunit/regress/regress-2790.js
copy to test/mjsunit/regress/regress-3025.js
index 927f2607cc1f16ab56acdb21d1a77fd4dc8dbe58..ccb3830687b9eeff358b0aff5e02e3e89d35b8cf 100644
--- a/test/mjsunit/regress/regress-2790.js
+++ b/test/mjsunit/regress/regress-3025.js
@@ -25,7 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Test that we can create arrays of any size.
-for (var i = 1000; i < 1000000; i += 197) {
-  new Array(i);
-}
+var n = 0x8000000000000800;
+assertEquals(n, 9223372036854778000);
+var s = n.toString(5);
+var v = parseInt(s, 5);
+assertEquals(n, v);