176
PROGRAM SHEET
Program for
Prime Factor Analysis
Description
Produces prime factors of arbitrary positive integers
For 1 <
m < 10
10
Prime numbers are produced from the lowest value first. “END” is displayed at the end
of the program.
(Overview)
m is divided by 2 and by all successive odd numbers (d = 3, 5, 7, 9, 11, 13, ....) to check
for divisibility.
Where
d is a prime factor, mi = mi–1/d is assumed, and division is repeated until
mi + 1 < d.
Example [1]
119 = 7 × 17
[2]
440730 = 2 × 3 × 3 × 5 × 59 × 83
[3]
262701 = 3 × 3 × 17 × 17 × 101
Preparation and operation
•Store the program written on the next page.
•Execute the program as shown below.
Step Key operation Display Step Key operation Display
No.
1
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