Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 503039906 was exactly right!
What do you guess are the next two digits of my number?
50303990600
50303990601
50303990602
50303990603
50303990604
50303990605
50303990606
50303990607
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50303990641
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50303990666
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50303990671
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50303990680
50303990681
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