> imo=9811000

I find it neat? strange? that IMO numbers have checksums:

> An IMO number is made of the three letters "IMO" followed by a seven-digit number. This consists of a six-digit sequential unique number followed by a check digit. The integrity of an IMO number can be verified using its check digit. This is done by multiplying each of the first six digits by a factor of 2 to 7 corresponding to their position from right to left. The rightmost digit of this sum is the check digit. For example, for IMO 9074729: (9×7) + (0×6) + (7×5) + (4×4) + (7×3) + (2×2) = 139.[10][11]

* https://en.wikipedia.org/wiki/IMO_number#Structure

MMSI numbers do not:

* https://en.wikipedia.org/wiki/Maritime_Mobile_Service_Identi...

> I find it neat? strange? that IMO numbers have checksums:

It’s a relatively common feature of ID numbers: https://en.wikipedia.org/wiki/Luhn_algorithm

Was this comment intended for a different thread?

Probably not. The site linked uses imo numbers for ship ids.

Is OK for me but maybe the web server is submerged under the load

Unfortunately at 02:53:44 GMT a web request which, due to high botnet activity and a packet storm, experienced poor routing conditions and unfortunately became wedged in one of the major transatlantic fiber optic cables. Network operators are working to free the stuck request. It is estimated that 50 billion requests per minute are queueing in the cable which will soon become filled if the situation is not resolved quickly. Experts fear the effects to international browsing, and some requests have already begun to take "the long way around."

I know we typically don’t upvote humor here, but that was really good.