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A069680
Primes with either no internal digits or all internal digits are 5.
8
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 151, 157, 251, 257, 353, 359, 457, 557, 653, 659, 751, 757, 853, 857, 859, 953, 1553, 1559, 2551, 2557, 3557, 3559, 5557, 6551, 6553, 7559, 9551, 15551, 15559, 45553
OFFSET
1,1
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 06 2002
EXTENSIONS
Offset corrected and name changed by Arkadiusz Wesolowski, Sep 07 2011
STATUS
approved