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A069679 Primes with either no internal digits or all internal digits are 4. 8

%I

%S 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,

%T 97,149,241,347,349,443,449,541,547,641,643,647,743,941,947,1447,2441,

%U 2447,3449,4441,4447,5441,5443,5449,6449,8443,8447,14447,14449,24443,44449

%N Primes with either no internal digits or all internal digits are 4.

%Y Cf. A069675, A069676, A069677, A069678, A069680, A069681, A069682, A069683, A069684.

%K nonn,base

%O 1,1

%A _Amarnath Murthy_, Apr 06 2002

%E Corrected by _Ray Chandler_, Nov 24 2003

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

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Last modified August 14 03:43 EDT 2020. Contains 336477 sequences. (Running on oeis4.)