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A187796 Primes whose digits are a permutation of (0, ..., m) for some m. 3
10243, 12043, 20143, 20341, 20431, 23041, 24103, 30241, 32401, 40123, 40213, 40231, 41023, 41203, 42013, 43201, 10235647, 10236547, 10243567, 10243657, 10245637, 10247563, 10254367, 10254763, 10256347, 10256473, 10257463, 10264357 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Starts with the 5-digit terms listed in A109176: There is no smaller prime of that form, since there is no odd number of that form with less than 3 digits, and those with digits {0,1,2} and {0,1,2,3} (as, e.g., 2013...) are all divisible by 3, thus composite.

For similar reasons, there cannot be terms with the 6 digits {0, ..., 5} or the 7 digits {0, ..., 6} (since 1 + ... + 5 (+ 6) is divisible by 3).

The 8-digit terms a(17)..a(2684) are also listed in A109177 and A109178 (in reverse order). Again, there are no 9- or 10-digit terms (since 0+1+...+8(+9) is divisible by 9). Therefore, the sequence has no terms beyond the 2684 terms < 76543210 listed in the b-file.

LINKS

M. F. Hasler, Table of n, a(n) for n = 1..2684

FORMULA

This sequence A187796 = A109176 union A109177.

EXAMPLE

As explained in the comments, there cannot be a term with fewer than 5 digits. The smallest number whose digits are a permutation of (0, ..., 4) is 10234, but this is even and cannot be a prime. The next larger one happens to be prime, so that's a(1) = 10243.

It is also explained in the comments why there's no term larger than 76543210. The largest odd numbers of the given form below this limit are of the form 7654xyz1 and 7654abc3, with xyz resp. abc permutations of 023 resp. 012. It happens that the case xyz=023 is the only one which yields a prime: this is the largest term of this sequence, a(2684) = 76540231 = A109178(1).

MATHEMATICA

Select[Prime@ Range[10^6], {1} == Union@ Prepend[Differences@ #, 1 + First@ #] &@ Sort@ IntegerDigits@ # &] (* Michael De Vlieger, Aug 20 2017 *)

Table[Select[FromDigits /@ Permutations[Range[0, n]], PrimeQ[ #] && DigitCount[ #, 10, 0] == 1 &], {n, 9}] // Flatten (* Harvey P. Dale, Jan 01 2020 *)

PROG

(PARI) forprime(p=2, , #vecsort(t=digits(p), , 8)==#t && #t==vecmax(t)+1 && print1(p", "))

CROSSREFS

Sequence in context: A235157 A156119 A109176 * A157735 A332532 A252031

Adjacent sequences:  A187793 A187794 A187795 * A187797 A187798 A187799

KEYWORD

nonn,base,nice,fini,full

AUTHOR

M. F. Hasler, Jan 06 2013

STATUS

approved

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Last modified February 26 00:49 EST 2020. Contains 332270 sequences. (Running on oeis4.)