Prime Factors


You can use the calculator to determine the prime factors of a whole number.


Calculating Prime Factors

Selecting { PF } from the NUMBER FUNCTIONS menu finds the lowest prime factor of the displayed value. To use the PF function:
  1. Enter the number.
  2. Press [ NUM ] and select { --> }.
  3. Select { PF }. The least prime factor is displayed and the remaining value is stored in the t-register (temporary register).
  4. Press [ x~t ]. The remaining value is displayed.
  5. Repeat steps 3 and 4 until the result is 1.
NOTE: If the first displayed factor of a number is 1, the number is prime.

Example

Find the prime factor of 102.

Procedure

Press

Display

Clear display[ CLEAR ]D_McSSNB
Enter a number102D_HF3YK2
Calculate least prime factor[ NUM ]
{ --> } { PF }
D_ZbJRo2
Display remaining value[ x~t ]D_3m2Mvf
Calculate next factor{ PF }D_sV3MGX
Display remaining value[ x~t ]D_hPPM7N
Calculate next factor[ x~t ]D_EXUE4m

The prime factors are 2, 3, and 17.

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