Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
You need to modify the init value of the variable lastPrime;
such as:
var lastPrime = NaN;
Cause you have no function to sort the number。
sort() default to sort the Array() according to ASCII