Search: id:A057628
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%I A057628
%S A057628 11,31,53,131,149,223,283,311,313,331,397,463,641,691,937,941,1439,
%T A057628 1511,1741,1871,1949,1993,1999,2111,2447,2939,3163,3391,3433,3499,3559,
%U A057628 3593,3659,3911,3931,5227,5399,5923,6163,6269,6653,6719,7177,7741,8389
%N A057628 Primes such that replacing each digit d with d copies of the digit d 
               produces a prime. Zeros are not allowed.
%e A057628 E.g. 641 becomes 66666644441 which is also prime.
%Y A057628 Cf. A057630.
%Y A057628 Sequence in context: A152293 A031287 A057630 this_sequence A144364 A031372 
               A028877
%Y A057628 Adjacent sequences: A057625 A057626 A057627 this_sequence A057629 A057630 
               A057631
%K A057628 nonn,base,nice,easy
%O A057628 0,1
%A A057628 G. L. Honaker, Jr. (honak3r(AT)gmail.com), Oct 10 2000
%E A057628 More terms from Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 
               2000.

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