P628 TELETEXT-TOOLS 628 Wed 01 Jan
00:00/00 PAGE ___
TELETEXT-TOOLS
PRIME FACTORS
NUMBER
ACTIVE
AS PRODUCT
AUTO
POWER FORM
AUTO
CHECK
AUTO
HINT
LIST
ENTER factorises • VIEW toggles LIST/TREE
WORKING
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HOW TO USE
Enter a whole number (≥2)
Press ENTER to factorise
VIEW switches LIST / TREE
EXAMPLE
84 = 2×2×3×7
= 2^2 × 3 × 7
WHAT YOU GET
AS PRODUCT: prime list
POWER FORM: grouped powers
WORKING: division steps / tree
PRIME?
PRIME? checks if the number is prime
If prime, factor list is just itself
KEYS
BS deletes • CLR clears
C resets • ENTER factorises
I help • P back
TIP
Try dividing by 2, 3, 5, 7…
Stop when divisor^2 > remainder
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NUMBER
ACTIVE
AS PRODUCT
AUTO
POWER FORM
AUTO
CHECK
AUTO
HINT
LIST
ENTER factorises • VIEW toggles LIST/TREE
WORKING
PAGE 1/2
HOW TO USE
Enter a whole number (≥2)
Press ENTER
VIEW LIST / TREE
EXAMPLE
84 = 2×2×3×7
= 2^2 × 3 × 7
KEYS
BS deletes • CLR clears
C resets • PRIME? checks
I help • P back
TIP
If output is just the number → it’s prime
Factor trees split until all primes
PAGE 2/2