A069680 Primes with either no internal digits or all internal digits are 5.

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

Author

Amarnath Murthy, Apr 06 2002

Keywords

• nonn
• base

Crossrefs

Cf. A069675, A069676, A069677, A069678, A069679, A069681, A069682, A069683, A069684.

Extensions

Offset corrected and name changed by Arkadiusz Wesolowski, Sep 07 2011