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A180552 Primes that become a different prime under the mapping 5 <=> 7. 1
5, 7, 53, 59, 73, 79, 251, 271, 353, 359, 373, 379, 509, 569, 571, 653, 673, 709, 751, 769, 1151, 1171, 1259, 1279, 1451, 1471, 1523, 1579, 1583, 1723, 1759, 1783, 2351, 2371, 2531, 2549, 2591, 2731, 2749, 2791, 3251, 3271, 3533, 3539, 3559, 3593, 3733 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Index to Primes, Primes that become a different prime under some mapping.
MATHEMATICA
fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 5] || MemberQ[id, 7]) && PrimeQ[ FromDigits[ id /. {5 -> 7, 7 -> 5}] ]]; Select[ Prime@ Range@ 550, fQ]
CROSSREFS
Sequence in context: A210244 A123789 A367572 * A168545 A320116 A320108
KEYWORD
base,nonn
AUTHOR
STATUS
approved

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Last modified March 29 11:45 EDT 2024. Contains 371278 sequences. (Running on oeis4.)