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There are no two "last" composite numbers. Just as with prime numbers, and all numbers, they go on for ever and ever and ever and ever ... ... .
They have probably come up in some lottery in some country.
Not on the UK lottery, there is no 55.
They end in: 0,2,4,6, and 8.
They never end but they also end at a zillion but a zillion is in the middle of the numbers