Arithmetic Numbers
775
Card Number Validation
613
Collatz
846
Divisors
769
Evil Numbers
1,000
Evil Numbers (Long)
1,000
Leap Years
714
Leyland Numbers
875
Look and Say
955
Niven Numbers
840
Niven Numbers (Long)
852
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
920
π
536