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A233385
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Primes that are a concatenations of n-th Mersenne exponent and n-th Mersenne prime.
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0
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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a(4) is 138191(prime number) where 13 is 5th Mersenne exponent and 8191 is 5th Mersenne prime.
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CROSSREFS
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KEYWORD
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nonn,base,less
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AUTHOR
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STATUS
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approved
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