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A058229
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Digits composite, each digit minus 1 is prime, sum of digits minus 1 is prime, difference of digits (in absolute value) minus 1 is prime.
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0
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4, 6, 8, 48, 84, 444, 446, 464, 488, 648, 666, 668, 684, 686, 848, 866, 884, 888, 4448, 4466, 4484, 4646, 4664, 4844, 6444, 6446, 6464, 6468, 6486, 6644, 6648, 6666, 6684, 6846, 6864, 6888, 8444, 8448, 8466, 8484, 8646, 8664, 8688, 8844, 8868, 8886, 44444
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OFFSET
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1,1
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COMMENTS
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If the digits of n are d1,d2,...,dn, then "difference of digits" means d1-d2-...-dn. - Sean A. Irvine, Jul 30 2022
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LINKS
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CROSSREFS
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KEYWORD
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nonn,less,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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