HP 35s Scientific Calculator - Manual (Page 278)

17-8 Miscellaneous Programs and Equations
LBL Y
VIEW Prime
LBL Z
P + 2 x →
LBL P
x P
3 D
→
→
LBL X
x = 0 ?
yes
no
Start
no
yes
Note: x is the
value in the
X-register.