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A046419
Repunit of length a(n) has exactly 8 prime factors (counted with multiplicity).
2
28, 51, 55, 58, 77, 86, 95, 98, 107, 115, 119, 124, 155, 161, 193, 209, 217, 218, 221, 233, 253, 265, 295, 298, 303, 314, 346
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Repunit
MATHEMATICA
Select[Range[320], PrimeOmega[FromDigits[Table[1, #]]]==8&] (* Harvey P. Dale, Sep 04 2018 *)
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest, Jul 15 1998
EXTENSIONS
More terms from Robert Gerbicz, Nov 22 2010
Offset changed to 1, a(23)-a(26) added by Ray Chandler, Apr 23 2017
a(27) from Max Alekseyev, May 14 2022
STATUS
approved