Converts this {@code BigInteger} to a {@code long}, checking
for lost information. If the value of this {@code BigInteger}
is out of the range of the {@code long} type, then an
{@code ArithmeticException} is thrown.
@return this {@code BigInteger} converted to a {@code long}.
@throws ArithmeticException if the value of {@code this} will
not exactly fit in a {@code long}.
@see BigInteger#longValue
Converts this {@code BigInteger} to a {@code long}, checking for lost information. If the value of this {@code BigInteger} is out of the range of the {@code long} type, then an {@code ArithmeticException} is thrown.
@return this {@code BigInteger} converted to a {@code long}. @throws ArithmeticException if the value of {@code this} will not exactly fit in a {@code long}. @see BigInteger#longValue