An adult test can't give such a score. However the Stanford-Binet test is still used for children. And in young children can still produce extremely high IQ s

An adult test can't give such a score. However the Stanford-Binet test is still used for children. And in young children can still produce extremely high IQ scores. Also note that while usually the standard deviation is made to be 15 these days, there are still tests, like the Binet and OLSAT, where the standard deviation is 16. That's why I said that the standard deviation depends on the test.