A069682 Primes with either no internal digits or all internal digits are 7.

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, 173, 179, 271, 277, 373, 379, 479, 571, 577, 673, 677, 773, 877, 971, 977, 1777, 2777, 3779, 5779, 6779, 8779, 27773, 27779, 47777, 47779, 57773, 67777, 77773, 97771

Offset: 1

Author

Amarnath Murthy, Apr 06 2002

Keywords

• nonn
• base

Crossrefs

Cf. A069675, A069676, A069677, A069678, A069679, A069680, A069681, A069683, A069684.

Extensions

Corrected by Ray Chandler, Nov 24 2003

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