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A181526
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Prime numbers such that the difference between any pair of digits is 1, 2, 3, 5 or 7.
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1
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2, 3, 5, 7, 13, 23, 29, 31, 41, 43, 47, 53, 61, 67, 79, 83, 89, 97, 103, 163, 241, 257, 421, 431, 457, 461, 463, 467, 479, 503, 523, 547, 563, 587, 613, 631, 641, 643, 647, 653, 683, 769, 853, 857, 863, 947, 967, 1423, 2053, 2143, 2341, 2503, 2543, 2749, 3461
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internal format)
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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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fQ[n_] := Union[ MemberQ[ {1, 2, 3, 5, 7}, # ] & /@ (Subtract @@ Sort[ #, Greater] & /@ Subsets[ IntegerDigits@ n, {2}])] == {True} && PrimeQ@ n; Select[ Range@ 4230, fQ]
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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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