login
A136186
Primes whose decimal and binary reversal are both prime.
2
3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 97, 101, 107, 113, 131, 151, 167, 181, 199, 313, 337, 353, 359, 373, 383, 701, 709, 727, 739, 757, 797, 907, 937, 941, 953, 967, 1033, 1091, 1109, 1153, 1181, 1193, 1201, 1217, 1229, 1259, 1439, 1453, 1471, 1487, 1619, 1669
OFFSET
1,1
LINKS
EXAMPLE
337 = 101010001 base 2, reverse the sequence of ones and zeros: 100010101 base 2 = 277. 337, 733 and 277 are all prime.
MATHEMATICA
Select[Prime[Range[300]], AllTrue[{IntegerReverse[#], FromDigits[ Reverse[ IntegerDigits[ #, 2]], 2]}, PrimeQ]&] (* Harvey P. Dale, Nov 11 2021 *)
CROSSREFS
Sequence in context: A206864 A155801 A228118 * A023210 A335120 A153601
KEYWORD
base,nonn
AUTHOR
Harry J. Smith, Dec 19 2007
STATUS
approved