Ahnentafel report help please

[Pettigrew]

I am using FTM2009 and I have 2339 people in my family tree.

When I run the Ahnentafel file with myself as the first person numbered 1, my parents are then numbered 2 and 3, grandparents 4,5,6,7 and this continues until it reaches a file that I had imported and it then the numbering seems to go wrong. The last person on the report my 24th generation is numbered 11796482.

How can I correct this?

[Elaine ..Spain]

Ahnentafel numbering would allow for all possibilities on your tree, regardless of whether you have a name for that ancestor.
You are 1,
parents 2 &3
gparents 4,5,6,7

so for each generation the numbers are doubled

which would mean
1st generation - 1 number allocated
2nd generation -2 numbers allocated
3rd generation -4 numbers allocated
4th generation -8 numbers allocated
5th generation -16 numbers allocated
6th generation -32 numbers allocated
etc

... if you carry on this numbering for 24 generations you would probably come to the number you have quoted!

[Pettigrew]

Elaine,

Thank you for your quick reply and explanation; I thought I had done something wrong.

[Mike Fisher]

Hi

That generations starts at 8388608 and goes to 16777215 and means that you have 8388608 direct ancestors in that generation, (which I think is 23 generations, 2 to the power of 23 from my 1950 school maths)

[Elaine ..Spain]

my calcs are wrong

What's up Mike?

[Mike Fisher]

I had misread the original number when I first posted so had to recalculate, gave my brain a bit of arithmetical exercise rather than family history exercise.

[Elaine ..Spain]

.... gave my brain a bit of arithmetical exercise ..

..better off using a calculator! ;)