Welcome, Again, to the Nostradamus Server!

I am impressed! Your guess that my number begins with 513886806 was exactly right!
What do you guess are the next two digits of my number?
51388680600
51388680601
51388680602
51388680603
51388680604
51388680605
51388680606
51388680607
51388680608
51388680609
51388680610
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51388680639
51388680640
51388680641
51388680642
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51388680644
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51388680650
51388680651
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51388680666
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51388680670
51388680671
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51388680680
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51388680699