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A180547 Primes that become a different prime under the mapping 4 <=> 6. 0
41, 47, 61, 67, 347, 367, 401, 419, 431, 461, 463, 467, 491, 601, 619, 631, 641, 643, 647, 691, 947, 967, 1049, 1069, 1409, 1427, 1447, 1493, 1499, 1609, 1627, 1667, 1693, 1699, 1847, 1867, 2141, 2161, 2417, 2459, 2467, 2477, 2617, 2647, 2659, 2677, 3041 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..47.

Index to Primes, Primes that become a different prime under some mapping.

MATHEMATICA

fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 4] || MemberQ[id, 6]) && PrimeQ[ FromDigits[ id /. {4 -> 6, 6 -> 4}] ]]; Select[ Prime@ Range@ 440, fQ]

CROSSREFS

Cf. A171032, A175791, A180517 thru A180559, A175789, A180560, A180561.

Sequence in context: A158847 A159023 A136294 * A329446 A243460 A186280

Adjacent sequences:  A180544 A180545 A180546 * A180548 A180549 A180550

KEYWORD

base,nonn

AUTHOR

Zak Seidov and Robert G. Wilson v, Sep 09 2010

STATUS

approved

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Last modified April 5 16:49 EDT 2020. Contains 333245 sequences. (Running on oeis4.)