Is there any official source that mentions it?
No.
However, what we know from DV-2012 is the following:
1. People with numbers up to EU32K got notifications (I am talking about DV-2012, not 2013)
2. VB listed cut offs in April as 32,000 for EU, but in May for 40000. In June they became current. That means there were numbers above EU40,000
3. Ankara consular schedule website listed a misterious number EU45,xxx.
4. There are no other numbers from EU above 32,xxx that I know of except this one.
So, official sources clearly mention there were cases above EU32K, but they never mentioned the maximum numbers per continent.
Can you please provide more information about where the number 61K came from? how did you come up with it?
Sure. Easily. I'll use DV-2012 data for that.
Everybody knows that probability to win does not depend on the country, it depends only on the region.
Let's consider two countries, Iran and Bangladesh, both from Asia.
There were 289,586 entries from Iran that produced 4,453 wins. Frequency of wins is 1.538%
There were 7,667,030 entries from Bangladesh that produced 2,373 wins. Frequency of wins is 0.031%. The second number is 50 times smaller than the first one.
Do you have an explanation why that happens even though the probability to win is the same?
I do.
Because junk entries cannot finally win and have to be excluded.
Bangladesh has more junk than Iran. Because we know all numbers, it is easy to calculate the following:
- Real probability to win cannot be less for Iran than 1.538%, but it could be more because of junk. Probability to win is the number of wins divided by the number of non-junk entries.
- If Iran has no junk at all (for example), then Bangladesh should have 7,667,030 * 1.538% = 117,919 wins. But it has only 2,373. When would Bangladesh' have 2,373 wins? When the number of non-junk entries is 2,373/1.538% = 154,291. That means that the number of junk entries from Bangladesh is 7,667,030-154,291 = 7,512,739.
- Those junk entries, of course, affect numbering, and they leave holes when junk is removed afterwards. So, out of 8,515,565 entries from Asia, 7,512,739 are junk from Bangladesh. That is 88.22%. That means that resulting numbering would have at least 88.22% holes. Of course, it would be even more, because of two reasons:
- There are countries with frequency of wins larger than Iran, like Lebanon (274 wins, 12,304 entries, frequency of wins is 2.227%). That means Iran has junk entries as well
- Other countries have junk entries as well.
You can sum all that up and figure out that 89.5% of Asian entries are junk. But I showed well enough that at least 88.22% came from Bangladesh and I showed how to calculate the rest.
What would that mean?
That in order to have 15,002 wins in Asia we need to have AS numbers up to about 143,000. Then the amount of junk entries among winners would be equal to 143,000-15,002 = 127,998, what is 127,998/143,000=89.5%, equal to the amount of junk in whole Asia (see above). And finally those 127,998 winning entries are excluded from 143,xxx numbers with 15,002 winning entries left. So, this gives a way to calculate the maximum number form Asia in DV-2012 as 143,xxx
Easy enough?
So, that is exactly what I did for DV-2013 for Europe, and I got 61K.