Arithmetic Numbers
775
Card Number Validation
613
Collatz
833
Divisors
769
Evil Numbers
1,000
Evil Numbers (Long)
1,000
Leap Years
665
Leyland Numbers
771
Look and Say
955
Niven Numbers
788
Niven Numbers (Long)
840
Odious Numbers
1,000
Odious Numbers (Long)
1,000
Pernicious Numbers
730
Pernicious Numbers (Long)
828
Prime Numbers
1,000
1,000
Prime Numbers (Long)
1,000
Smith Numbers
729
United States
835
π
529