HP HP-32S - Page 239

Program Listing:
Program Lines: Description:
Y01 LBL Y This routine displays the prime number.
Y02 VIEW P Displays the prime number P.
Bytes
and Checksum: 003.0, 9D08
201 LBL Z This routine adds 2 to P before testing to
see if P is prime.
Z02 2
Z03 RCL+ P
Bytes and Checksum: 004.5, E455
P01 LBL P This routine stores the input value for P.
P02 STO P
P03 3 Stores 3 in test divisor, D.
P04 STO D
Bytes and Checksum: 006.0, 9E38
X01 LBL X This routine tests P to see if it is prime.
X02 RCL P
X03 RCL* D
X04 FP Finds the fractional part of P+D.
X05 *=0? Tests for a remainder of zero (number not
prime).
X06GTOZ If the number is not prime, tries next
possibility.
X07 RCL P
X08 SQRT
X09 RCL 0
X10 x>y? Tests to see whether all possible factors
have been tried.
X11GT0Y If all factors have been tried, branches to
the display routine.
X12 2 Calculates the next possible factor, D + 2.
X13 ST0+ D
14: Miscellaneous Programs 237