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F10,21=10^(2^21)+1 is composite
Today I proved that F10,21=10^(2^21)+1 is composite by Yves Gallot's Proth.exe on 2.80GHz P4 PC with Windows XP,it has 2097153 digits and it is the smallest Generalized Fermat number characteristic unknown.
I hope that someone can check it again to prove that this thing is true. :cat: |
How long did it take?
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It took about a week.
This process took 8 days,including the time which this process paused.
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