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A171629
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Numbers n such that 10^n*(5+3*10^n)+3 is prime.
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0
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OFFSET
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1,3
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COMMENTS
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Values corresponding to n=6413 and n=6741 were both certified Fermat and Lucas PRPs with WinPFGW and submitted to Lifchitz's Top PRPs database.
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LINKS
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PROG
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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STATUS
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approved
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