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A074834
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Primes whose base 4 reversal is also prime.
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7
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2, 3, 5, 7, 13, 17, 23, 29, 31, 53, 59, 61, 67, 73, 79, 83, 89, 97, 101, 107, 193, 197, 199, 211, 233, 239, 241, 251, 257, 269, 277, 281, 293, 311, 313, 337, 353, 367, 373, 383, 397, 401, 409, 419, 433, 443, 449, 457, 461, 467, 487, 491, 499, 509, 787, 797, 809
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Prime[ Select[ Range[140], PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[ # ], 4]], 4]] &]]
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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STATUS
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approved
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