Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site

GCF ( A ; B )

Rate this function:  

  Average rating: 4.4  (28 votes)
  Discuss this Custom Function

Scott Morrison, InDev

Greatest Common Factor of two numbers

Sample Input:
GCF ( 126 , 324 )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Uses Euclid's method of recursively computing the GCF (the GCF of two numbers is the same as the GCF of the smaller and the remainder (modula) of the larger divided by the smaller; and by definition, the GCF of any number and 0 is the number)

Note that the lowest common multiple of two numbers is their product divided by their GCF. In otherwords:
LCM(A, B) = A * B / GCF(A,B)

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


This will be my first attenot to impliment of a Custom Fucntion with in FileMaker. I nearly need step by step instuctions as to how to set one up. The GCF Function is one that I need, but I also seek the Greatest Common Divisor (GCD) so I can constuct ratios exressions (34:1).

Might you be able to aide me?

Peter Kelley
St. Paul, MN USA

Peter Kelley, St. Paul, MN USA
February 06, 2014 6:02pm

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 2 + 3 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. SortList ( theList )
  (Sat, Jun 23, 8:45am)
2. HexUUIDToNum_cf (_uuid)
  (Sat, Jun 16, 1:55pm)
3. httpResponseCode ( responseHeaders )
  (Tue, Jun 12, 10:40pm)
4. FindDuplicateCharacters ( string )
  (Fri, Jun 08, 5:01pm)
5. FieldRepetitionLast ( field ; maxRepetition )
  (Wed, Jun 06, 6:05pm)
6. CountModifiedRecords ( NameTimestampField ; StartTimestamp ; EndTimestamp )
  (Mon, May 28, 8:23am)
7. JSONArrayLength ( JSONArrayStr )
  (Fri, May 25, 7:46am)
8. interpolation (y1; y2; y3; x1; x2; x3; x1y1; x2y1; x1y2; x2y2; rnd)
  (Sat, May 19, 3:55am)

RSS Feed of Custom Functions