How are USMC boot camp platoons numbered?

[Golani]

Hope I'm posting it the right place..

I just finished a book called "Making the corps" which paritialy escorts a Marine platoon during boot camp in Parris Island (in March 1995) the platoon number is 3086.
At the end of the book the author returnd to one of the former drill instructors of 3086 and that is now in platoon 3002. (October 1996)
in Full Metal Jacket the platoon number is 3092.

Now all that leads to the question, how are the USMC boot camp platoons are given numbers? obviously the 30 is repetitive and I guess the 86/02/92 is circular, but what stands behind it? does the 30 represent the battalion...?

Any info will do,
Thanks.

[pijoe]

1, 2, 3, Recruit Traning Battalion(s). The first digit denotes the battalion. I was in Platoon 2097. ("2nd Battalion Second to None.") MCRD San Diego. formed October 1979.