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A230485
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Strong pseudoprimes n to base 2 such that n-2 and n+2 are primes.
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3
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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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3465253618401 is a strong pseudoprime (base 2) and 3465253618399 and 3465253618403 are primes.
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CROSSREFS
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KEYWORD
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nonn,more,hard
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AUTHOR
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STATUS
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approved
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