HP 35s Scientific Calculator - Manual (Page 280)

17-10 Miscellaneous Programs and Equations
Flags Used:
None.
Program Instructions:
1. Key in the program routines; press  when done.
2. Key in a positive integer greater than 3.
3. Press P to run program. Prime number, P will be displayed.
4. To see the next prime number, press  .
Variables Used:
Remarks:
No test is made to ensure that the input is greater than 3.
Example:
What is the first prime number after 789? What is the next prime number?
P Prime value and potential prime values.
D Divisor used to test the current value of P.
Keys:
(In ALG mode)
Display: Description:

P 

Calculates next prime number after
789.
 

Calculates next prime number after
797.