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A171612
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Integers n such that (25*10^n)+1 is prime.
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0
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1, 8, 255, 320, 609, 688, 1436, 3271, 3921, 6520, 19604
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OFFSET
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1,2
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COMMENTS
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No others less than 20000.
See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "25001".
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LINKS
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EXAMPLE
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For n=8 we have (25*10^8)+1 = 25*100000000+1 = 2500000000+1 = 2500000001, which is prime.
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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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Julien Peter Benney (jpbenney(AT)ftml.net), Dec 13 2009
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EXTENSIONS
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STATUS
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approved
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