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 A131648 Primes > 100 in which every multi-digit substring is also prime. 3
 113, 131, 137, 173, 179, 197, 311, 313, 317, 373, 379, 419, 431, 479, 613, 617, 619, 673, 719, 797, 971, 1373, 3137, 3797, 6131, 6173, 6197, 9719 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Minimum number of digits is taken to be 3 as all two-digit primes would be trivial members. LINKS EXAMPLE 9719 is a member becauase 97, 71, 19, 971, 719, 9719 are all primes. MATHEMATICA Select[Prime[Range[26, 1300]], And@@PrimeQ[Flatten[Table[FromDigits/@ Partition[ IntegerDigits[#], n, 1], {n, 2, IntegerLength[#]-1}]]]&] (* Harvey P. Dale, Nov 03 2012 *) CROSSREFS Cf. This sequence is a subsequence of A069488 - Primes > 100 in which every substring of length 2 is also prime. Sequence in context: A060591 A214847 A069488 * A180441 A180421 A180407 Adjacent sequences:  A131645 A131646 A131647 * A131649 A131650 A131651 KEYWORD base,fini,full,nonn AUTHOR Tanya Khovanova, Sep 09 2007 STATUS approved

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Last modified December 16 00:55 EST 2018. Contains 318157 sequences. (Running on oeis4.)