Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 509718655 was exactly right!
What do you guess are the next two digits of my number?
50971865500
50971865501
50971865502
50971865503
50971865504
50971865505
50971865506
50971865507
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50971865510
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50971865538
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50971865560
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50971865571
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50971865575
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50971865577
50971865578
50971865579
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50971865591
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50971865595
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50971865599